172 BPM
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4/4 ×2
Drag rhythmic values into up to 8 beat blocks per line to build a drum groove, or click a tile then click a block to place it — handy on a trackpad.
Math skill: Find a Coefficient in a Binomial Expansion
How the beat teaches it: Every slot gives (x+1)ⁿ and asks for one term's coefficient — the binomial theorem says the x^k term's coefficient is C(n,k), the same combinations count Grade 12 computed for probability. Build that many notes anywhere in the kit.
This is lesson 23 of 24 in RockBlocks Math, College Algebra, a free course where every lesson turns a math idea into something you can count, hear, and play. The previous lesson, “Partial Fraction Decomposition,” covered decompose a Rational Expression Into Two Simpler Fractions. Next is Lesson 24, “Capstone: Systems and Function Evaluation Together.”
Every slot above (A, B, C, D) is its own question, and it’s a real, blank RockBlocks beat the whole time — the same drag-and-drop tiles, kit, tempo, sheet music, and drummer view as anywhere else on the site. Tap ❓ Questionin the corner to read the current slot’s problem, build your answer right in the grid, then tap ✓ Check Answerto grade it. Once you’re done, keep going: expand the beat, drop it into a Stack, or save a copy to your own page — nothing here overwrites the lesson itself, so every visitor still starts from the same blank slots.