Time to Five Minutes

Count round in fives. What time is it, and is it morning or afternoon?

Book Measure and data 2.MD.C.7 ALPACA · Early number

New to clocks? Start here. A short lesson with a clock you can watch move, and then move yourself. Nothing to get wrong, and it takes about 8 minutes.

Show me how a clock works → How does a clock work again?

▤ Print this All of 2nd grade

For grown-ups

How long: 10 to 15 minutes is plenty. Short and frequent beats long and occasional — the early-numeracy trials with the largest effects ran eight weeks or less.
When they get one wrong: the page shows the working. Read it together rather than moving straight on. Feedback that explains is worth several times more than feedback that only marks right or wrong, and that gap is wider in maths than in any other subject.
Not timed: thinking time is the point of a book. Let silences run.
Print it too: doing the same problems on paper a few days later is worth more than doing twice as many today.

What this practises

Reading a clock to the nearest five minutes, and telling a.m. from p.m.

No efficacy trial sits behind this one; the site does not claim otherwise. The ordering is taken from the acquisition sequence that is confirmed across grades 1 to 3 — hour, half hour, quarter, five minutes, minute — which puts five minutes here and not earlier, and the same literature reports "past" as easier than "to", so nothing asks for "five to four". The coverage argument is plain: 2.MD.C.7 had no activity, and the grade-1 book stops at the half hour.

The underlying idea: Reading to five minutes is skip counting applied to a circle. The dial is a number line bent round, each numeral worth five, so the skill rests on fives fluency rather than on anything new about clocks. The hour-hand error gets worse as the minute hand goes round, so the decoys keep offering the hour it is nearly at.
Where this sits in Illustrative Mathematics: 2nd grade Unit 6: Geometry, Time, and Money
Sources: Illustrative Mathematics / Kendall Hunt (2024) · Illustrative Mathematics (2024) all references →

Related measured skill: ALPACA · Early number. What this means