Odd or Even
Determine whether a group of objects (up to 20) has an odd or even number of members
Lesson
Set out your lesson
Use pairs to identify odd/even and split an even set into equal groups.
Before teaching
Can discuss the supplied example in an accessible mode; adapt directions without supplying the target answer.
Check the learner can follow the model with support before moving on. Source prerequisite ordering is not learner mastery; return to prerequisite work when needed.
Share and support
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
Illustrative Mathematics · Practice link — not the full lesson
Buttons odd and even
Before you open · source notes
Buttons are paired to decide whether a count is odd or even. Emphasise leftover ones for odd numbers, not every even-rule story.
Free, no sign-in. A teacher solution is on the same page, so use the student view with your child.
Before you openAsk whether a counted set makes pairs with none left over, and say odd or even. Pairing once does not certify every even number.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public Illustrative Mathematics task page. The .html address responds HTTP 308 to this URL. An anonymous GET of this URL on 2026-11-11 returned HTTP 200 with no login or payment prompt. Where a teacher solution is present, it is on the same page as the student task; this check did not find a separate locked student view. An adult can use the student view section and should not read a solution aloud. Advertising was not observed in the fetched HTML text; that is not a browser, device, or ad-free guarantee. This is a paper or discussion task, not an automatically marked interactive game. Opening the link does not save practice or assess mastery. Diagrams on the page use missing or filename-only alt text, so they are not an accessible image equivalent. Accessibility still depends on an adult describing the picture.
Illustrative Mathematics. “Buttons odd and even.” Licensed CC BY-NC-SA 4.0. External task; Gakuva does not copy, host, embed, or redistribute it.
CC BY-NC-SA 4.0 — link only
Check understanding
- Pair objects and determine whether there is one left over (odd) or not (even)
- Count a group by 2s to determine if the total is even
- Write an equation to express an even number as a sum of two equal addends (e.g. 8 = 4 + 4)
“If your child has a group of 14 objects, can they tell you whether that number is odd or even — for example by pairing them up to see if any are left over?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Number Representation & Place Value
- Age range
- Ages 7–8
Standards