Finds the total number of items in two groups by counting all of them.
Observe whether the child: finds the total number of items in two groups by counting all of them.
What it looks like
Three ways this behaviour shows up as a child grows. Each level includes everyday moments to watch for.
Emerging
Just starting
Attempts to count across two groups but makes frequent correspondence errors (skips/double-counts) or restarts inconsistently. Needs adult prompting to include both groups and to use one-to-one counting.
What you might see
When shown two small piles and asked “How many altogether?”, answers with a single number word without counting.
Counts the first group only, stops, and reports that number as the total for both groups.
Counts across both groups but touches one item twice or misses items when groups are close together.
Restarts counting from one multiple times during the same problem and cannot decide on a final total without adult help.
Expected
On track
Counts all items across two groups in small, familiar situations by starting at one and counting every item, but may be slow or lose track. Success improves with clear layout and adult support to organise the groups.
What you might see
Counts all items across two groups when an adult spreads them out and prompts “count every one”.
Uses a count-all strategy (starts at one and counts every item) successfully for small totals, but may need a reminder to keep objects still.
Exceeding
Going further
Independently combines two groups and accurately finds the total by counting all items, keeping track across both groups. Works with different arrangements and can re-check if unsure.
What you might see
Independently moves the two groups together and counts through the combined set accurately, then states the total.
If challenged, recounts the combined set and either confirms the same total or corrects their answer.
Explains how they found the total (e.g., “I counted them all—this pile and that pile”).
Uses the total-finding strategy spontaneously in play (e.g., adding two piles of counters for a game) and checks a peer’s result by recounting.
Try this at home
Small everyday moments where you can notice this behaviour without setting up anything special.
Snack: Put 3 grapes in one bowl and 2 in another and ask, “How many altogether?”—watch whether your child counts all items across both bowls.
Play: Make two small piles of blocks and ask your child to find the total; notice whether they organise the blocks to help counting.
Storytime: On a page with two groups of objects (e.g., two sets of animals), ask “How many altogether?” and see if your child counts all.
Bath: Place some bath toys at one end and some at the other; ask “How many altogether?” and observe counting accuracy across the two groups.
Outdoor: Collect two sets of stones/leaves and ask your child to find the total by counting all items in both sets.
Connected behaviours
Behaviours that scaffold, follow, or co-emerge with this one.
The framework source and supporting developmental research.
Framework source
Development Matters in the EYFS (DfE, 2012) — Mathematics: Numbers (40–60+ months).
Defines count-all total finding across two groups as an expected observable strategy within this age band.
Developmental research
Fuson, K. C. (1988). Children’s Counting and Concepts of Number. Springer-Verlag.
Describes developmental progressions in counting procedures and early addition strategies, including count-all approaches.
Five-level rubric (detailed)ShowHide
The full progression underlying the three levels above. Used by the platform’s reasoning agent when planning activities and observations.
Not Yet
Does not treat two groups as a combined set; gives a guess or counts only one group. May not attempt to count all items when asked for a total.
When shown two small piles and asked “How many altogether?”, answers with a single number word without counting.
Counts the first group only, stops, and reports that number as the total for both groups.
Emerging
Attempts to count across two groups but makes frequent correspondence errors (skips/double-counts) or restarts inconsistently. Needs adult prompting to include both groups and to use one-to-one counting.
Counts across both groups but touches one item twice or misses items when groups are close together.
Restarts counting from one multiple times during the same problem and cannot decide on a final total without adult help.
Developing
Counts all items across two groups in small, familiar situations by starting at one and counting every item, but may be slow or lose track. Success improves with clear layout and adult support to organise the groups.
Counts all items across two groups when an adult spreads them out and prompts “count every one”.
Uses a count-all strategy (starts at one and counts every item) successfully for small totals, but may need a reminder to keep objects still.
Secure
Independently combines two groups and accurately finds the total by counting all items, keeping track across both groups. Works with different arrangements and can re-check if unsure.
Independently moves the two groups together and counts through the combined set accurately, then states the total.
If challenged, recounts the combined set and either confirms the same total or corrects their answer.
Reflexive
Selects an efficient strategy when appropriate (e.g., counts all, or begins to count-on from the first group) and explains their approach. Applies total-finding flexibly in play and problem situations and can support peers.
Explains how they found the total (e.g., “I counted them all—this pile and that pile”).
Uses the total-finding strategy spontaneously in play (e.g., adding two piles of counters for a game) and checks a peer’s result by recounting.
