See the numbers.
Touch the idea.
Move sliders, change values, and watch mathematical ideas come alive — no memorizing formulas first. This English section is being written lesson by lesson, starting with elementary school mathematics.
🔢 Elementary school · Grades 1–2
Nine activities for Grades 1–2, keeping every original interactive experiment and adding a clear, human-written explanation in English.
🔟 Elementary school · Grades 3–4
Twelve more activities covering place value, fractions, lines and angles, coordinate moves, time, measurement, and graphs.
🔢 Elementary school · Grades 5–6
Twenty-three activities covering factors and multiples, ratio and proportion, solid shapes, surface area and volume, and statistics.
🔷 Middle school · Grade 7
Sixteen activities covering prime factorization, integers, equations, polygon angles, congruence, solid shape volume, and frequency tables.
📏 Middle school · Grade 8
Eleven activities covering repeating decimals, expressions, inequalities, linear functions, geometry, and combinatorics.
🔷 Middle school · Grade 9
Five activities covering square roots and real numbers, trig ratios, inscribed angles, circle properties, and data dispersion (box plots & scatter plots).
🎓 High School 1
Fifteen High School 1 activities — binomial expansion, sets and propositions, imaginary and complex numbers, factoring, quadratic inequalities, various functions, circles, trigonometry, and matrices.
🎓 High School 2
All twenty planned High School 2 activities — derivatives, integrals, exponential and logarithmic functions, sequences and their limits, the unit circle, trig function graphs, probability and statistics, the Fibonacci spiral, and Pascal's triangle.
🎓 High School 3
Nine High School 3 activities — derivatives of various functions, parametric and implicit differentiation, integration techniques, substitution and integration by parts, ellipses, parabolas, hyperbolas, 3D coordinates, and vectors.