Short, practical reading for parents and teachers of grades 1 to 6. The posts cover math fact fluency (what it is, how fast is fast enough, and what each grade is expected to know), how to run a 10-minute practice routine at home or as a class warm-up, and what the research says about short, frequent retrieval practice. Each one ends with something you can do tomorrow.
October 2026 · ~6 min read
Every fact from 1 × 1 to 12 × 12, ranked by how often children get it wrong. The 12s are hardest, 11 × 12 is missed a third of the time, and 54 and 56 swap places. What the wrong answers reveal.
October 2026 · ~5 min read
Post a drill that opens the exact skill and level you chose, in two clicks: the link maker, shared Chromebooks, collecting scores without teacher accounts, and a simple weekly routine with a Friday Mad Minute.
September 2026 · ~7 min read
A classroom version of the 10-minute routine: the minute-by-minute shape, three ways to handle a wide spread of levels, shared-device pitfalls, and the signal that tells you it is working.
September 2026 · ~8 min read
There is no single national benchmark — but the Common Core fluency standards are specific, and the digits-per-minute numbers you find online are screening thresholds rather than goals. What to measure, and how to check a child in five minutes.
April 2026 · ~6 min read
A practical, research-anchored guide to setting up a sustainable daily multiplication practice habit for grades 3–5. What time of day works, why short sessions beat long ones, and how to know when to level up.
More from Num Drill: the research behind the app · for teachers · for parents & homeschoolers · free printable worksheets