Catalog

Programs available today

Each program is its own skill tree, with its own placement test and its own progression. A kid can be in different hexes in different programs at the same time.

Arithmetic

Counting, addition, subtraction, times tables, division. 11 hex.

14 blocks · 64 skillsAges 4–11

Counting, addition, subtraction, multiplication, division, and mental shortcuts.

  1. 1. Hex 1 — First numbers

    46

    Count to 10 · Add +1 · Subtract −1

  2. 2. Hex 2 — Adding & taking 2-3

    56

    Add +2 · Add +3 · Subtract −2 · Subtract −3 · +1

  3. 3. Hex 3 — Adding & taking 4-5

    57

    Add +4 · Add +5 · Subtract −4 · Subtract −5 · +3

  4. 4. Hex 4 — Adding & taking 6-7

    67

    Add +6 · Add +7 · Subtract −6 · Subtract −7 · +3

  5. 5. Hex 5 — Adding & taking 8-9

    67

    Add +8 · Add +9 · Subtract −8 · Subtract −9 · +1

  6. 6. Hex 6 — Single-digit fluency

    68

    Single-digit addition (mixed) · Single-digit subtraction (mixed) · Near doubles · Subtract from 20 · +1

  7. 7. Hex 7 — Two-digit & first tables

    68

    Two-digit addition (no carry) · Two-digit subtraction (no borrow) · Multiply by 2 · Multiply by 5 · +2

  8. 8. Hex 8 — Two-digit fluency

    79

    Two-digit addition (with carry) · Two-digit subtraction (with borrow) · Multiply by 3 · Multiply by 4 · +3

  9. 9. Hex 9 — Times tables fluency

    79

    Multiply by 6 · Multiply by 7 · Multiply by 8 · Multiply by 9 · +3

  10. 10. Hex 10 — Division (easy)

    89

    Divide by 2 · Divide by 5 · Divide by 10

  11. 11. Hex 11 — Division (full)

    810

    Divide by 3 · Divide by 4 · Divide by 6 · Divide by 7 · +2

  12. 12. Hex 12 — Multi-digit multiplication

    910

    Two-digit × one-digit multiplication

  13. 13. Hex 13 — Long division

    1011

    Long division (multi-digit)

  14. 14. Hex 14 — Decimals & beyond

    1011

    Decimals — tenths and hundredths

Fractions

Halves, quarters, equivalents. 2 hex (expanding).

9 blocks · 43 skillsAges 5–12

Halves, quarters, thirds; notation a/b on number line; equivalence and comparison; ± × ÷; decimals/percent; bar model word problems.

  1. 1. Fractions 1 — Foundations

    57

    Half of a figure or set · A quarter of a figure or set · Half of even numbers · Quarter of multiples of 4

  2. 2. Fractions 2 — Partitions & unit fractions

    68

    A third of multiples of 3 · Naming unit fractions · Equal parts

  3. 3. Fractions 3 — Notation & number line

    79

    Fraction notation a/b · Fractions on the number line · Unit vs non-unit fractions · Wholes as fractions

  4. 4. Fractions 4 — Equivalence & comparison

    810

    Equivalent halves · Equivalent fractions (general) · Simplify fractions · Compare fractions (same denominator) · +2

  5. 5. Fractions 5 — ± with same/related denom

    810

    Add halves · Add fractions (same denom) · Subtract fractions (same denom) · Add fractions (related denom) · +1

  6. 6. Fractions 6 — Of a quantity, improper & mixed

    911

    Unit fraction of a quantity · Fraction of a quantity · Improper fractions · Mixed numbers · +1

  7. 7. Fractions 7 — Decimal & percent

    911

    Fraction → decimal (tenths) · Fraction → decimal (hundredths) · Decimal → fraction · Fraction → percent · +1

  8. 8. Fractions 8 — Four operations

    1011

    Add fractions (unlike denom) · Subtract fractions (unlike denom) · Multiply fraction × whole · Multiply fraction × fraction · +2

  9. 9. Fractions 9 — Bar model & ratio

    1112

    Divide fraction ÷ fraction · Word problems with bar model · Fractions in measurement · Percent increase / decrease · +1

Geometry

Shapes, perimeter, area. 3 hex (expanding).

11 blocks · 56 skillsAges 5–12

Shapes, attributes, symmetry, angles, perimeter, area, volume, transformations.

  1. 1. Shapes 1 — Identify 2D & 3D

    56

    Identify 2D shapes · Identify 3D shapes · 2D vs 3D · Position words · +1

  2. 2. Shapes 2 — Attributes & turns

    67

    Defining attributes · Sides of shapes · Corners of shapes · Halves and quarters · +1

  3. 3. Shapes 3 — Polygons & symmetry

    78

    Polygons by sides · 3D shape attributes · Thirds · Arrays (rows × columns) · +1

  4. 4. Shapes 4 — Angles & lines

    89

    Quadrilateral hierarchy · Introduction to angles · Perpendicular and parallel lines · Triangle by sides · +1

  5. 5. Shapes 5 — Perimeter & area

    89

    Perimeter of squares · Perimeter of rectangles · Perimeter of polygons · Find unknown side from perimeter · +1

  6. 6. Shapes 6 — Protractor

    910

    Lines, rays and segments · Angle types (acute / right / obtuse) · Measure angles with protractor · Draw angles with protractor · +1

  7. 7. Shapes 7 — Classification & 3D

    910

    Classify triangles · Parallelogram, rhombus, trapezoid · Cubes and prisms · Nets of cube and cuboid · +2

  8. 8. Shapes 8 — Coordinates & angles

    1011

    Coordinate plane (Q1) · 2D shape hierarchy · Angles in a triangle = 180° · Angles on a line / at a point · +1

  9. 9. Shapes 9 — Areas & volume

    1011

    Area of triangle · Area of parallelogram · Area of trapezoid · Volume of cube/cuboid · +2

  10. 10. Shapes 10 — Circles & composites

    1112

    Circumference of a circle · Area of a circle · Area of composite figures · Polygons on the coordinate plane · +2

  11. 11. Shapes 11 — Transformations

    1112

    Rotational symmetry · Translation, reflection, rotation · Scale drawings

Reading

Letters, phonics, vocabulary, comprehension. 30 skills, 8 hex.

10 blocks · 39 skillsAges 4–12

From first letters to comprehension: phonics, sight words, fluency, vocabulary, grammar, and reading strategies.

  1. 1. Reading 1 — First letters & rhymes

    46

    Letter recognition · Letter sounds · First sight words · Rhyming pairs

  2. 2. Reading 2 — Words & syllables

    56

    Three-letter words · More sight words · Word to picture · Counting syllables · +2

  3. 3. Reading 3 — Phonics patterns

    57

    Digraphs (sh, ch, th) · Initial blends (br, st, fl) · Silent e (cake, bike) · Compound words

  4. 4. Reading 4 — Vocabulary

    67

    Vowel teams (ai, ee, oa) · Word categories · Synonyms · Grade-1 sight words

  5. 5. Reading 5 — Sentences

    68

    Opposites · Simple sentences · End punctuation (. ? !) · Contractions (don't, I'm)

  6. 6. Reading 6 — Word study

    79

    Prefixes (un-, re-) · Capitalization · Suffixes (-s, -ed, -ing) · Grade-2 sight words · +1

  7. 7. Reading 7 — Comprehension basics

    79

    Homophones (their/there) · Short stories · Sequence of events

  8. 8. Reading 8 — Comprehension strategies

    810

    Predict what's next · Main idea · Cause and effect · Figurative language

  9. 9. Reading 9 — Theme & perspective

    911

    Summarize a passage · Find the theme · Point of view · Inference from text

  10. 10. Reading 10 — Evidence & analysis

    1012

    Cite textual evidence

landing.programs.pre_algebra.name

landing.programs.pre_algebra.summary

11 blocks · 70 skillsAges 12–14

Integers and rationals, expressions and equations, linear functions and slope, systems, exponents, Pythagoras, and stats/probability — calibrated to CCSS G7-G8 + Singapore Sec 1-2.

  1. 1. Pre-Algebra 1 — Integers

    1213

    Compare and order integers · Add and subtract integers · Multiply and divide integers · Absolute value · +1

  2. 2. Pre-Algebra 2 — Rationals & order of ops

    1213

    Compare rational numbers · Add and subtract rationals · Multiply and divide rationals · Convert between rational forms · +1

  3. 3. Pre-Algebra 3 — Algebraic expressions

    1213

    Evaluate algebraic expressions · Combine like terms · Distribute (expand) · Factor common term · +1

  4. 4. Pre-Algebra 4 — Linear equations

    1213

    One-step equations · Two-step equations · Multi-step equations · Equations with fractions · +2

  5. 5. Pre-Algebra 5 — Inequalities & proportion

    1313

    One-step inequalities · Two-step inequalities · Graph inequalities on a number line · Ratio and proportion · +2

  6. 6. Pre-Algebra 6 — Exponents, roots & sci notation

    1313

    Exponents — product law · Exponents — quotient law · Exponents — power of a power · Exponents — zero & negative · +4

  7. 7. Pre-Algebra 7 — Coordinate plane & functions

    1314

    Coordinate plane (4 quadrants) · Functions: input/output · Function — formal definition · Linear vs non-linear functions · +2

  8. 8. Pre-Algebra 8 — Slope & y = mx + b

    1314

    Slope from a graph · Slope from two points · Slope-intercept form (y = mx + b) · Graph from equation · +2

  9. 9. Pre-Algebra 9 — Systems 2×2

    1314

    Systems — graphical · Systems — substitution · Systems — elimination · Systems — special cases · +1

  10. 10. Pre-Algebra 10 — Pythagoras & 3D volume

    1314

    Pythagorean theorem · Pythagorean — informal proof · Pythagorean — word problems · Pythagorean — 3D diagonals · +4

  11. 11. Pre-Algebra 11 — Transformations, stats & probability

    1314

    Rigid transformations on coordinates · Dilations on coordinates · Congruence via transformations · Similarity via transformations · +6

landing.programs.algebra_1.name

landing.programs.algebra_1.summary

11 blocks · 60 skillsAges 13–15

Linear functions deep, polynomials, factoring, quadratic functions and equations, exponentials, sequences, radicals, rational expressions, and statistics with formal regression — the delta over pre-algebra, calibrated to CCSS HS Algebra/Functions + Singapore Sec 3-4.

  1. 1. Algebra 1.1 — Linear functions deep

    1314

    Point-slope form · Standard form Ax + By = C · Perpendicular slopes · Linear word problems (advanced) · +1

  2. 2. Algebra 1.2 — Polynomials & operations

    1314

    Polynomial notation · Add and subtract polynomials · Multiply polynomials · Special products of binomials · +1

  3. 3. Algebra 1.3 — Factoring techniques

    1314

    Factor — GCF (advanced) · Factor by grouping · Factor — difference of squares · Factor — perfect square trinomial · +3

  4. 4. Algebra 1.4 — Quadratic functions (graph)

    1414

    Quadratic — standard form · Quadratic — vertex form · Axis of symmetry · Compute the vertex · +2

  5. 5. Algebra 1.5 — Quadratic equations (solve)

    1414

    Solve quadratic by factoring · Solve by completing the square · Quadratic formula · Discriminant · +2

  6. 6. Algebra 1.6 — Exponential functions

    1414

    Rational exponents · Exponential function — definition · Exponential graphs · Exponential growth & decay · +1

  7. 7. Algebra 1.7 — Sequences

    1414

    Arithmetic sequence — explicit · Arithmetic sequence — recursive · Geometric sequence · Sum of a sequence

  8. 8. Algebra 1.8 — Radicals & rational expressions

    1415

    Simplify radicals · Operations with radicals · Rationalize the denominator · Radical equations · +4

  9. 9. Algebra 1.9 — Inverse, piecewise, absolute value

    1415

    Inverse functions — definition · Compute an inverse function · Evaluate a piecewise function · Graph a piecewise function · +2

  10. 10. Algebra 1.10 — Advanced inequalities & nonlinear systems

    1415

    Compound inequalities (AND/OR) · Absolute value inequalities · Systems of inequalities (graph) · Nonlinear systems (linear-quadratic)

  11. 11. Algebra 1.11 — Regression, correlation & causation

    1415

    Linear regression (formal) · Regression residuals · Correlation coefficient r · Correlation vs causation

landing.programs.geometry_secondary.name

landing.programs.geometry_secondary.summary

11 blocks · 64 skillsAges 14–16

Formal proofs (two-column, paragraph, flow), congruence and similarity criteria, right-triangle and oblique trigonometry, advanced circle theorems, analytic geometry, 3D solids and constructions — calibrated to CCSS HS Geometry + Singapore Sec 3-4 + Cambridge IGCSE 0580 Extended.

  1. 1. Geometry HS 1 — Reasoning & proof structure

    1414

    Formal geometry notation · Conditional statements · Inductive vs deductive reasoning · Two-column proof · +2

  2. 2. Geometry HS 2 — Lines, angles & theorems

    1414

    Prove: vertical angles theorem · Prove: parallels & transversal · Prove: perpendicular bisector · Prove: triangle sum 180° · +1

  3. 3. Geometry HS 3 — Congruence criteria

    1414

    Congruence — rigid motion definition · Congruence — SSS · Congruence — SAS · Congruence — ASA / AAS · +2

  4. 4. Geometry HS 4 — Triangles & quadrilaterals

    1415

    Isoceles base angles · Midsegment theorem · Parallelogram properties (proof) · Rectangle / rhombus / square (proof) · +1

  5. 5. Geometry HS 5 — Similarity

    1515

    Similarity — dilation definition · Similarity — AA · Similarity — SAS / SSS · Triangle proportionality · +2

  6. 6. Geometry HS 6 — Right-triangle trigonometry

    1515

    Trig ratios (sin / cos / tan) · Special right — 30°-60°-90° · Special right — 45°-45°-90° · Solve a right triangle · +2

  7. 7. Geometry HS 7 — Oblique trigonometry

    1515

    Law of sines · Law of cosines · Triangle area = ½ ab sin C · Solve oblique triangles

  8. 8. Geometry HS 8 — Advanced circle theorems

    1515

    Inscribed angle theorem · Tangent ⊥ radius · Two tangents from external point · Alternate segment theorem · +2

  9. 9. Geometry HS 9 — Analytic geometry

    1516

    Distance formula (apply) · Midpoint formula · Circle equation · Circle from completing the square · +2

  10. 10. Geometry HS 10 — 3D & constructions

    1516

    3D surface area · Volume of a frustum · Cross-sections of solids · Cavalieri's principle · +6

  11. 11. Geometry HS 11 — Modeling & synthesis

    1516

    Density (area & volume) · Geometric design problem · Geometric optimization · 3D trigonometry

landing.programs.algebra_2.name

landing.programs.algebra_2.summary

12 blocks · 88 skillsAges 15–18

Logarithms, advanced polynomials, rational and radical functions, complete trigonometry (unit circle + identities + equations + graphs), series with sigma and infinite sums, matrices and 3×3 systems, combinatorics with binomial theorem, advanced probability with conditional + Bayes + normal distribution, conics and complex numbers — calibrated to CCSS HS Algebra 2 + IB AA SL Y1 + Cambridge AS 9709 + Singapore JC1 H2.

  1. 1. Algebra 2.1 — Logarithms

    1516

    Logarithm definition · Common log (base 10) · Natural log (ln) · Log property — product · +3

  2. 2. Algebra 2.2 — Exponential & log equations

    1516

    Solve exponential equation with log · Solve logarithmic equation · Exp/log systems · Continuous compound interest (Pe^rt) · +1

  3. 3. Algebra 2.3 — Advanced polynomials

    1516

    Polynomial long division · Synthetic division (Ruffini) · Remainder theorem · Factor theorem · +4

  4. 4. Algebra 2.4 — Rational & radical functions

    1516

    Vertical asymptotes · Horizontal asymptotes · Oblique asymptotes · Holes in rational graphs · +4

  5. 5. Algebra 2.5 — Unit circle & radians

    1616

    Radian definition · Radian ↔ degree conversion · Unit circle — special angles · Unit circle — exact values · +3

  6. 6. Algebra 2.6 — Trig identities & equations

    1616

    Pythagorean identity · Reciprocal identities · Quotient identities · Sum/difference identities · +5

  7. 7. Algebra 2.7 — Trig graphs & inverse

    1617

    Sine and cosine graphs · Tangent graph · Amplitude, period, phase shift · Periodic modeling · +2

  8. 8. Algebra 2.8 — Series (sigma + infinite)

    1617

    Sigma notation (Σ) · Arithmetic series sum · Geometric series — finite sum · Geometric series — convergence · +1

  9. 9. Algebra 2.9 — Matrices & 3×3 systems

    1617

    Matrix notation & dimensions · Add and subtract matrices · Multiply matrices · Determinant 2×2 · +4

  10. 10. Algebra 2.10 — Combinatorics & binomial

    1617

    Multiplicative counting · Permutations P(n, r) · Combinations C(n, r) · Pascal's triangle · +1

  11. 11. Algebra 2.11 — Advanced probability & normal

    1717

    Conditional probability · Independence test · Multiplication rule · Bayes' rule (intro) · +5

  12. 12. Algebra 2.12 — Conics & complex numbers

    1718

    Conic — circle (review) · Conic — parabola (focus/directrix) · Conic — ellipse · Conic — hyperbola · +7

landing.programs.pre_calculus.name

landing.programs.pre_calculus.summary

11 blocks · 66 skillsAges 16–18

Advanced functions (composition, inverse, piecewise), end-behavior with limit notation, advanced trig identities (half-angle, product-to-sum, sum-to-product), 2D + 3D vectors with dot and cross product, parametric and polar curves, complex numbers in polar/Euler form with DeMoivre's theorem and n-th roots, intuitive limits and continuity (IVT, L'Hôpital), sequences and series with telescoping and partial sums, mathematical induction (sum and divisibility), intuitive derivative (tangent, instantaneous rate, velocity) and intuitive integral (Riemann sum, signed area) — calibrated to CCSS HS Functions/Number-CN + IB AA SL Y2 + Cambridge AS/A2 9709 + Singapore JC1-JC2 H2 + Japan SHS Math II/III + Korea KICE 2022 Revised.

  1. 1. Pre-Calc 1 — Advanced functions

    1617

    Function composition (f ∘ g) · Decompose a function into f ∘ g · Formal inverse function · Inverse with domain restriction · +3

  2. 2. Pre-Calc 2 — Transformations & asymptotes

    1617

    Chained transformations a · f(b(x − c)) + d · End behavior with lim notation · Complete asymptotic analysis (V/H/oblique + holes) · Sketch an unknown polynomial function · +1

  3. 3. Pre-Calc 3 — Advanced trig identities

    1617

    Half-angle identities sin(θ/2), cos(θ/2) · Product-to-sum identities · Sum-to-product identities · Rigorously prove a trig identity

  4. 4. Pre-Calc 4 — Vectors (2D + 3D + dot/cross)

    1617

    Vector notation and magnitude |v| · Vector addition and subtraction · Scalar multiplication of vectors · 3D vectors (i, j, k) · +5

  5. 5. Pre-Calc 5 — Parametric curves

    1617

    Parametric representation (x(t), y(t)) · Eliminate the parameter t · Classic parametric curves (line, ellipse, cycloid) · Parametric motion (projectile, circular)

  6. 6. Pre-Calc 6 — Polar coordinates

    1617

    Polar coordinates (r, θ) · Polar ↔ rectangular conversion · Classic polar graphs (cardioid, rose, spiral) · Polar conic with focus at origin · +1

  7. 7. Pre-Calc 7 — Complex polar + DeMoivre

    1617

    Complex — polar form full (r cis θ) · Complex — Euler form e^(iθ) · Complex — multiply/divide in polar form · DeMoivre's theorem · +1

  8. 8. Pre-Calc 8 — Limits & continuity

    1718

    Intuitive definition of a limit · Limit by algebraic substitution · Limit by factoring or rationalizing · One-sided limits (left/right) · +6

  9. 9. Pre-Calc 9 — Sequences, series & induction

    1718

    Recursive vs explicit sequences · Convergence of a sequence (intuitive) · Telescoping series · Series and partial sums · +3

  10. 10. Pre-Calc 10 — Derivative (intuitive)

    1718

    Formal average rate of change · Secant line vs tangent line · Instantaneous rate of change concept · Derivative as a limit · +2

  11. 11. Pre-Calc 11 — Integral (intuitive)

    1718

    Area by rectangle approximation · Formal Riemann sum · Integral as a limit (concept) · Simple geometric integrals

landing.programs.calculus_intro.name

landing.programs.calculus_intro.summary

13 blocks · 94 skillsAges 17–19

Formal single-variable calculus: ε-δ definition of limit, classical continuity theorems (IVT formal, EVT, Bolzano, MVT, Rolle), derivative with all rules (power, product, quotient, chain, implicit, logarithmic), derivatives of transcendentals (trig, inverse trig, exp, log, hyperbolic, higher-order), curve analysis (monotonicity, concavity, inflection, full sketching), modeling (optimization, related rates, Newton-Raphson, L'Hôpital formal), antiderivatives + u-substitution + integration by parts, definite integral via Riemann sum + FTC parts I and II, advanced techniques (partial fractions in three forms, trig substitution, trig powers, reduction formulas, improper integrals types I and II), applications (area between curves, volumes by disks/washers/shells, arc length, surface area of revolution, work), separable ODEs (exponential growth formal, Newton's cooling, logistic intro, slope fields), formal sequences and series with all convergence tests (divergence, geometric, p-series, comparison, limit comparison, ratio, root, integral, alternating Leibniz), absolute vs conditional convergence, power series with radius and interval, Taylor and Maclaurin series with Lagrange remainder, classical Maclaurin series (e^x, sin, cos, ln(1+x), 1/(1−x), arctan), binomial series — calibrated to AP Calculus AB+BC + IB AA HL Y2 + Cambridge A2 9709 (Pure 3) + Singapore JC2 H2 + Japan SHS Math III + Korea KICE 2022 Revised Calculus + freshman university (MIT 18.01 / Stanford / UC Berkeley Math 1A-1B / UNAM Cálculo I-II).

  1. 1. Calc 1 — Limits (ε-δ formal)

    1718

    ε-δ definition of limit · Limit existence proof (ε-δ) · Proof of limit properties · Squeeze (sandwich) theorem · +2

  2. 2. Calc 2 — Continuity classical theorems

    1718

    Bolzano's theorem · IVT formal with proof · Extreme Value Theorem (Weierstrass) · MVT for continuous functions · +2

  3. 3. Calc 3 — Derivative + rules

    1718

    Derivative — formal definition (full) · Power rule (real n) · Sum/difference rule · Product rule · +4

  4. 4. Calc 4 — Derivatives of transcendentals

    1718

    Derivatives of all 6 trig functions · Derivatives of inverse trig · Derivative of e^x and a^x · Derivative of ln x and log_a x · +3

  5. 5. Calc 5 — Curve analysis (f', f'', sketch, MVT)

    1718

    Monotonicity from f' · Local vs global extrema · First derivative test classification · Concavity from f'' · +5

  6. 6. Calc 6 — Modeling with derivative

    1718

    Constrained optimization · Related rates · Linear approximation · Newton-Raphson method · +2

  7. 7. Calc 7 — Antiderivative + indefinite integral

    1718

    Antiderivative definition · Basic antiderivative formulas · Antiderivatives of transcendentals · u-substitution · +2

  8. 8. Calc 8 — Definite integral + FTC

    1718

    Riemann integral (formal) · Riemann sum → definite integral · Properties of definite integral · FTC Part I (g(x) = ∫_a^x f) · +3

  9. 9. Calc 9 — Advanced integration techniques

    1819

    Partial fractions — distinct linear · Partial fractions — repeated linear · Partial fractions — irreducible quadratic · Trigonometric substitution · +4

  10. 10. Calc 10 — Integral applications

    1819

    Area between curves · Volume — disk method · Volume — washer method · Volume — shell method · +3

  11. 11. Calc 11 — Separable ODEs

    1819

    Separable ODE — solve · Exponential growth/decay ODE · Newton's law of cooling ODE · Logistic ODE (intro) · +1

  12. 12. Calc 12 — Sequences & series formal

    1819

    Sequence convergence (formal) · Series convergence (formal) · Divergence test · Geometric series (formal) · +7

  13. 13. Calc 13 — Power series & Taylor

    1819

    Absolute vs conditional convergence · Power series — radius and interval · Power series — termwise diff/integration · Taylor series definition · +4

landing.programs.calculus_2.name

landing.programs.calculus_2.summary

14 blocks · 98 skillsAges 18–20

Multivariable + vector calculus + ODEs II at the university freshman/sophomore ceiling: 3D vectors with cross product and scalar triple product, lines + planes + quadric surfaces in 3D, vector-valued functions with unit tangent / normal / binormal, curvature and torsion, motion decomposition, multivariable functions with ε-δ limits + path test + Clairaut, partial derivatives + differentiability + tangent planes, multivariable chain rule with tree diagrams, directional derivative + gradient + perpendicular to level surfaces, multivariable extrema with second derivative test 2D + Lagrange multipliers (one and two constraints) + Taylor 2D quadratic, double integrals (rectangular + Type I/II + polar) with applications (volume, mass, centroid), triple integrals (rectangular + cylindrical + spherical) with Jacobians and moments of inertia, vector fields + divergence + curl + conservative fields + potential functions, line integrals (scalar + vector) + path independence + Fundamental Theorem for Line Integrals + Green's theorem (circulation + flux forms), parametrized surfaces + surface integrals (scalar + flux) + Stokes' theorem + divergence theorem + theorem strategy choice. ODEs II: linear first-order with integrating factor, exact ODEs, integrating factors for non-exact, Bernoulli, first-order modeling (mixing, RC circuits); second-order linear with constant coefficients (real distinct, repeated, complex), undetermined coefficients (polynomial, exponential/trig), resonance modification, variation of parameters with Wronskian, reduction of order, mass-spring (unforced, damped, forced + resonance), RLC circuit. Calibrated to MIT 18.02 + 18.03, UC Berkeley Math 53 + 54, Stanford MAT 51 + 53, UNAM Cálculo III + IV, Cambridge Tripos IA Vector Calculus + Differential Equations, Tokyo 解析学 II.

  1. 1. curriculum.hexes.calculus_2_hex_1

    1819

    curriculum.skills.vector_3d_review_full · curriculum.skills.dot_product_3d_full · curriculum.skills.cross_product · curriculum.skills.scalar_triple_product · +4

  2. 2. curriculum.hexes.calculus_2_hex_2

    1819

    curriculum.skills.quadric_ellipsoid · curriculum.skills.quadric_paraboloid · curriculum.skills.quadric_hyperboloid · curriculum.skills.quadric_cone_cylinder · +1

  3. 3. curriculum.hexes.calculus_2_hex_3

    1819

    curriculum.skills.vector_function_definition · curriculum.skills.vector_function_derivative_integral · curriculum.skills.unit_tangent_principal_normal · curriculum.skills.binormal_frenet_basics · +4

  4. 4. curriculum.hexes.calculus_2_hex_4

    1819

    curriculum.skills.multivariable_function_domain · curriculum.skills.level_curves_surfaces · curriculum.skills.multivariable_limit_definition · curriculum.skills.multivariable_limit_path_test · +2

  5. 5. curriculum.hexes.calculus_2_hex_5

    1819

    curriculum.skills.partial_derivative_definition · curriculum.skills.partial_derivative_geometric · curriculum.skills.higher_order_partials · curriculum.skills.clairaut_theorem · +3

  6. 6. curriculum.hexes.calculus_2_hex_6

    1819

    curriculum.skills.chain_rule_one_independent · curriculum.skills.chain_rule_two_independent · curriculum.skills.chain_rule_tree_diagrams · curriculum.skills.implicit_differentiation_2d_3d · +3

  7. 7. curriculum.hexes.calculus_2_hex_7

    1819

    curriculum.skills.critical_points_multivariable · curriculum.skills.second_derivative_test_2d · curriculum.skills.saddle_point_classify · curriculum.skills.absolute_extrema_closed_region · +3

  8. 8. curriculum.hexes.calculus_2_hex_8

    1920

    curriculum.skills.double_integral_rectangle · curriculum.skills.double_integral_type_i · curriculum.skills.double_integral_type_ii · curriculum.skills.change_order_integration · +3

  9. 9. curriculum.hexes.calculus_2_hex_9

    1920

    curriculum.skills.triple_integral_rectangular · curriculum.skills.triple_integral_general_region · curriculum.skills.triple_integral_cylindrical · curriculum.skills.triple_integral_spherical · +3

  10. 10. curriculum.hexes.calculus_2_hex_10

    1920

    curriculum.skills.vector_field_definition · curriculum.skills.divergence_compute · curriculum.skills.curl_compute · curriculum.skills.conservative_field_test · +2

  11. 11. curriculum.hexes.calculus_2_hex_11

    1920

    curriculum.skills.line_integral_scalar · curriculum.skills.line_integral_vector · curriculum.skills.line_integral_path_independence · curriculum.skills.gradient_theorem · +2

  12. 12. curriculum.hexes.calculus_2_hex_12

    1920

    curriculum.skills.parametric_surface_basics · curriculum.skills.surface_normal_orientation · curriculum.skills.surface_integral_scalar · curriculum.skills.surface_integral_vector_flux · +3

  13. 13. curriculum.hexes.calculus_2_hex_13

    1920

    curriculum.skills.ode_linear_first_order_integrating_factor · curriculum.skills.ode_exact_test_solve · curriculum.skills.ode_integrating_factor_nonexact · curriculum.skills.ode_bernoulli · +1

  14. 14. curriculum.hexes.calculus_2_hex_14

    1920

    curriculum.skills.ode_second_order_homogeneous_real_distinct · curriculum.skills.ode_second_order_homogeneous_repeated · curriculum.skills.ode_second_order_homogeneous_complex · curriculum.skills.ode_undetermined_coefficients_polynomial · +8

Coming next

  • ✏️

    Writing — letter formation, copying, basic spelling, sentence building. Requires deeper research before we ship it.

  • 🔬

    Science, astronomy, anatomy. Designed once the four math+reading programs are stable.

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