138 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 Missing Complementary or Supplementary Angle (G-CO.C.9)
How the beat teaches it: Every slot gives one angle in a complementary (sum to 90°) or supplementary (sum to 180°) pair — subtract to find the other angle, then build that many notes anywhere in the kit.
This is lesson 1 of 24 in RockBlocks Math, Grade 10, a free course where every lesson turns a math idea into something you can count, hear, and play. It is the first lesson in Grade 10, so it assumes no prior math or drumming. Next is Lesson 2, “Vertical Angles and Linear Pairs.”
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.