# Staff key: b-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: Unit

**Look for in this source:** Each full strip represents ten objects, verified from its ten cells. Four is the number of strips, not the value of one strip.

**Next teaching for this question:** Audit a new strip by touching all ten cells; connect one strip to ten singles.

**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: Whole

**Look for in this source:** Four tens are forty; forty plus six is forty-six.

**Next teaching for this question:** Use a new two-tens/five-ones model and distinguish strip count from object values.

**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: Replacement

**Look for in this source:** Remove one original strip and replace it with ten singles: three tens and sixteen ones, or thirty and sixteen. No old strip plus its singles are simultaneously counted.

**Next teaching for this question:** In a new thirty-one model, exchange one strip while covering/removing the old strip.

**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: Equality

**Look for in this source:** Thirty plus sixteen still represents forty-six original objects; the replaced ten is matched once.

**Next teaching for this question:** Match the same ten members to a strip and its replacement, then recount the new whole without duplication.

**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.