Even or Odd? — Number Sense for Grade 2

About this activity

A number from 1 to 20 appears and the child decides whether it is even or odd, then taps the Even or Odd tile. With just the two choices, the child judges every number on its own — is it the kind that pairs up evenly, or the kind with one left over? It's a free, interactive Grade 2 number activity that runs in the browser with no sign-up.

The big idea is that even and odd are about whether a count can be split into two equal groups with nothing left over. A child is not adding or subtracting here; they are sorting whole numbers by structure. Working across the whole range from 1 to 20, with both choices always present, builds the quick recognition — and the habit of checking the ones place — that makes even and odd feel automatic.

It is aligned to Common Core 2.OA.C.3 — determining whether a group of objects has an odd or even number of members. No timer, no score — just calm, playful practice.

What's inside this activity

• Designed for Grade 2 learners (ages about 7–8)
• Common Core strand: Operations & Algebraic Thinking
• Aligned to Common Core standard 2.OA.C.3

How to play

Look at the number shown on the board.

Decide if it is even or odd and tap the matching tile, then press Check.

Not quite? Try again as many times as you like — there is no timer and no score.

What your child practices

• Decide whether a number from 1 to 20 is even or odd
• Understand even numbers as pairs with nothing left over, and odd as one extra
• Look at the ones digit as a quick way to tell even from odd
• Sort whole numbers by their structure rather than by adding or subtracting

Learning goals

Tell whether a number up to 20 is even or odd — the focus of Common Core 2.OA.C.3

Explain even as pairs with none left over and odd as one extra

Build the number sense that supports later work with equal groups and multiplication