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.

🎵 Kindergarten Lesson 4: Missing Numbers in a Row — Counting Sequence to 10 (K.CC.A.1) mess around all you want, nothing here saves
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🎯 Lesson: 0/4 · 🥁 0 solved · 0 badges

Kindergarten, Lesson 4: Missing Numbers in a Row

Math skill: Counting Sequence to 10 (K.CC.A.1)

How the beat teaches it: Every slot is a counting sequence with one number missing — figure out what belongs there and build that many quarter notes.

This is lesson 4 of 24 in RockBlocks Math, Kindergarten, a free course where every lesson turns a math idea into something you can count, hear, and play. The previous lesson, Which Number Is Bigger?,” covered comparing Numbers (K.CC.C.6). Next is Lesson 5, Counting Bigger Groups.”

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.