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.