# Staff key: a-first

Source and own response remain separate. Preserve first thinking and actual support before reading this key into feedback. A correct supplied value is not independent discovery.

## Question 1: Coverage

**Look for in this source:** All twelve source members each have exactly one place; no object is omitted or counted in both parts.

**Next teaching for this question:** On a new six-object collection, move each once from waiting into one of two places.

**Later invitation:** choose a new complete case after that teaching. Record changed quantity/arrangement and prior familiarity; do not repeat this exact answer until memorised.

## Question 2: Remaining part

**Look for in this source:** Five plus seven accounts for twelve; second part is seven. A counted/directed model is accepted.

**Next teaching for this question:** Use a different eight-object collection with three separated; count the five remaining, then recombine.

**Later invitation:** choose a new complete case after that teaching. Record changed quantity/arrangement and prior familiarity; do not repeat this exact answer until memorised.

## Question 3: Alternative

**Look for in this source:** Any distinct valid two-part account covering twelve once, such as six and six or four and eight; copying five/seven unchanged is not another split.

**Next teaching for this question:** Move one divider or one object on a new eleven-object set, then name both changed parts.

**Later invitation:** choose a new complete case after that teaching. Record changed quantity/arrangement and prior familiarity; do not repeat this exact answer until memorised.

## Question 4: Same whole

**Look for in this source:** Recombine or match members to show both accounts represent the original twelve; do not add both pictures as two collections.

**Next teaching for this question:** Use the same seven pieces, show two accounts and match each original object once.

**Later invitation:** choose a new complete case after that teaching. Record changed quantity/arrangement and prior familiarity; do not repeat this exact answer until memorised.

Accept different supported valid partitions subject to the particular question constraints. Record each component independently, with actual source/range/support. Maths hints, access supports and adult physical acts stay distinct. No speed, neatness, voice or motor score; no five-point grade inferred from four questions.

Original SubjectNest teaching and drawings © NeuroForgeIO Pty Ltd 2026, [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Credit SubjectNest by NeuroForgeIO Pty Ltd, version 0.1.0, source and licence; note changes. Curriculum and provider rights remain separate.

Modified from the named State of Queensland (QCAA) [Years 1–2 techniques/conditions, October 2023](https://www.qcaa.qld.edu.au/downloads/aciqv9/mathematics/assessment/ac9_maths_technique_cond_yr1-2.pdf), [Year 1 standards elaborations, April 2025](https://www.qcaa.qld.edu.au/downloads/aciqv9/mathematics/assessment/ac9_maths_se_yr1.pdf) and [complexity/familiarity advice,2025](https://www.qcaa.qld.edu.au/downloads/aciqv9/mathematics/assessment/ac9_maths_create_questions_complex_familiar_yr1.pdf). Original mathematical tasks/criteria are ours; adapted conditions and folio guidance retain © QCAA 2023/2025, CC BY 4.0 subject to [QCAA copyright](https://www.qcaa.qld.edu.au/copyright), exclusions/third-party notices and no endorsement. No source student work/media/marks/glossary is supplied.