# Formative transfer checks Days 15 and 20

These **new fictional sources** differ from the teaching packet, learner routes, print aids and optional examples. This page and the worked key are public, so these are not secure test items; change a case locally if prior access matters. They sample transfer across selected English, mathematics and design/economic reasoning; they are not a grade, diagnosis, real-world approval or complete Year 8 judgement. Collect the first response before an edit. Note independent print, exact adult reading, calculator, AAC, directed scribe and prompts separately. Read-aloud supports listening comprehension, **not independent print decoding**. A wrong arithmetic operation may need a mathematics next move; do not infer that source analysis is absent. If a learner cannot respond, mark *not yet observed* and revisit with another fresh source. Keep all work privately under school policy; SubjectNest receives no identifying evidence.

## Check A Day 15 new ribbon source

**New fictional paper source, shown only today:**

> A design note proposes **three identical paper ribbons**. Each ribbon has an 8 cm title space and `k` labels, each 5 cm long. The length of one ribbon is `8+5k` cm; the length of **all three combined** is `Q(k)=3(8+5k)` cm. Each ribbon is drawn on a 33 cm line. With `k=5`, one ribbon needs `8+5×5=33` cm and the three together need 99 cm of paper length. With `k=6`, one needs 38 cm, beyond the drawn 33 cm line. No adhesive, real board or reader test has been measured.
>
> A draft caption says: “Three ribbons fit every real noticeboard. Every reader will find every label. Our 99 cm result proves it.”

All ribbons, people, dimensions and results are invented. This is not a physical-installation plan or safety approval.

**Learner tasks:**

1. Expand `3(8+5k)` and explain what the 3 multiplies. Use the source to say what 33 cm and 99 cm each measure.
2. Give one valid model conclusion at `k=5` or `k=6`, with the unit and source condition.
3. Identify one phrase in the caption that outruns the paper note. Explain exactly what evidence is missing.
4. Make a three- or four-sentence caption or equivalent directed/oral/AAC response for a new reader, with the sourced result, a limit and one **specific** next paper or approved site/reader test. Do not claim a real installation is authorised.

**Timing:** 3-minute frame, 5-minute exact reading, 7-minute independent first pass, 12-minute response, 5-minute self-audit, 3-minute collection. Use the separate [Check A worked key](TEACHER-KEY.md#check-a-day-15-worked-key) after collection.

## Check B Day 20 new zine session source

**New fictional time-and-cost source, shown only today:**

> The paper-zine desk has a **38-minute model session**. Setup takes **6 minutes**, and each complete demonstration takes **8 minutes**. For a non-negative whole number `r` of demonstrations, `6+8r≤38`. Four demonstrations use 38 minutes; five would need 46. Separately, two fictional suppliers quote costs for `c` blank paper-zine kits: H asks `H(c)=10+3c` tokens, J asks `J(c)=5c` tokens. The imaginary materials budget is 25 tokens. At `c=4`, H costs 22 and J costs 20. Neither quote reports paper quality, waste or availability. The number of people, kits used per demonstration, questions, changeover and access arrangements are unknown.
>
> A poster says: “**Everyone will finish a zine in this session!** Four demonstrations fit and four kits cost only 20 tokens, so the result is guaranteed.”

Everything in this source is invented. `r` counts demonstrations and `c` counts kits; neither variable counts people.

**Learner tasks:**

1. Use substitution or an inequality step to state the largest complete model demonstration count, with a check at the next whole number.
2. Compare the **listed** H and J costs at four kits and say which fits the imaginary budget; keep `r` and `c` distinct.
3. Identify an unsupported poster promise and explain why the time and cost results do not establish it.
4. Write, direct or give a quiet oral/AAC four-sentence recommendation to the fictional editor: valid model result, cost comparison, source limit and one checkable next question.

**Timing:** 3-minute frame, 5-minute exact reading, 7-minute independent first pass, 12-minute response, 5-minute self-audit, 3-minute collection. See the private [Check B worked key](TEACHER-KEY.md#check-b-day-20-worked-key).

## Private recording strip

`Date | school-local learner code | A/B | first exact words/marks | later edit | access route and tools | prompt given | criterion next move | revisit date`. Store only in school-approved private storage. Never add a real learner record to this repository or a public website.

**Original resource rights:** © NeuroForgeIO Pty Ltd 2026, SubjectNest, [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Credit author, source, licence and changes.