Use the note tool, paper and original aidsYear 4 Maths · T2 W11–12 · Teacher · Teacher / Tool and aids

Current status

Original source candidate · 13 October 2026. Root accepted the full written proposal after different reviews. Source, visual, callback and Browser reviews remain separate; no classroom, accessibility, full-year, translation or audio approval is claimed.

Implemented helper

The candidate optional Additive Work Bench implements seven literal fields/four views/two explicitly kept notes/native sources/paper alternative. No solver, hidden storage, grading, AI or recording. data/TOOL-CONTRACT.json and proposal-origin/TOOL-AND-AIDS.md retain the earlier written status; this manual describes the implemented source candidate.

Field limits in each mode

The 1,200 Unicode code-point check and overflow announcement operate only after successful script initialization. Without script, or after an initialization failure, the seven fields keep the native maxlength of 2,400 UTF-16 code units: some supplementary characters use two units. The automatic 1,200-point check and announcement are unavailable in those modes; the fields may therefore retain more than 1,200 ordinary characters up to that native limit. The complete paper note has no automatic character limit. The full inherited contract below and data/TOOL-CONTRACT.json describe the working helper; this current qualification governs static and failure modes. Full source disclosures are not field values and remain complete.

Complete contract

Twenty candidate visuals

1. Id

   V01

   Title

   One total, every part

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 51 ordinary badge source, 612+243=855.

   Full alternative

   A labelled adult place-value model for fictional badges. The first parcel 612 is 600+10+2; the second 243 is 200+40+3. Joining same-unit parts gives 800+50+5=855 badges. A second path adds 200, 40 and 3 to 612, reaching 812, 852 and 855. Neither display is a learner response or real stock count.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

2. Id

   V02

   Title

   The amount stays the same

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 52 ordinary costume tag source, 364+278=642.

   Full alternative

   An adult model of 364+278 tags. Partitioning gives 500+130+12. Twelve ones rename as one ten and two ones, so 500+140+2. Fourteen tens rename as one hundred and four tens, yielding 600+40+2=642. The tag quantity remains the same through each renaming. A separate chunk check also yields 642.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

3. Id

   V03

   Title

   Add an extra, then remove it

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 53 ordinary 398+267 sticker source.

   Full alternative

   An adult exact-compensation model. Fictional 398 and 267 stickers total 665. Replacing 398 with 400 adds two extra, gives 667, then removing those extra two yields 665. A separate estimate 400+300≈700 checks scale; it is not the exact total.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

4. Id

   V04

   Title

   A zero can be regrouped

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 54 ordinary 806−247 labels source.

   Full alternative

   An adult model for 806 labels with 247 used. It first renames 806 as 7 hundreds, 9 tens and 16 ones. Subtracting 2 hundreds, 4 tens and 7 ones leaves 5 hundreds, 5 tens and 9 ones, or 559 labels. Check 247+559=806. A count-up path from 247 to 250 to 800 to 806 adds 3+550+6=559. This is modelled remaining stock, not an observed action.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

5. Id

   V05

   Title

   A gap with a meaning

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 55 ordinary poster requirement 1203 versus 987 labels.

   Full alternative

   A precisely scaled adult number line compares fictional poster requirements 987 and 1203 labels. Counting from 987 to 1000 adds 13, from 1000 to 1200 adds 200, and from 1200 to 1203 adds 3. The gap is 216 labels, checked by 987+216=1203. Both design requirements remain; the greater number is not a judgement about design quality.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

6. Id

   V06

   Title

   Known part, missing part, whole

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 56 ordinary 468+□=725 cards target.

   Full alternative

   An adult part-whole model uses 725 fictional cards as the whole. The known part is 468; the further part is initially shown with a box. The separate adult key gives 257, with 468+257=725. The two bar widths are proportional to 468 and 257. This labelled adult model must not be used as a genuinely empty own aid or an unseen held source.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

7. Id

   V07

   Title

   Which number is missing?

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 57 ordinary 930−□=586 tags and□−175=428 cards.

   Full alternative

   Two separate adult unknown-role models. In a fictional tag record 930 start and 586 left give 344 used; 930−344=586. In a different fictional card record 175 used and 428 left give 603 start; 603−175=428. The unknown counts a used amount in the first equation and a starting amount in the second. Card and tag quantities are not combined.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

8. Id

   V08

   Title

   Each full side is equal

   Role

   Adult ordinary model; exposed solution separate from genuine blank own work

   Complete source

   Day 58 ordinary 245+□=390+75.

   Full alternative

   An adult equality model for 245+□=390+75. The known right side is 465. The missing left part is 220 because 465−245=220. Substitution gives 245+220=465 and 390+75=465. Schematic bars stand for equal whole amounts and are explicitly not to scale; the box value 220 is not the whole-side value 465.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

9. Id

   V09

   Title

   A pretend badge cupboard · neutral source and my turn

   Role

   Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

   Complete source

   A fictional badge cupboard has 364 badges. Another parcel supplies 278 badges of the same kind. Count each badge once. The task is to find the new total; no actual stock or delivery is claimed.

   Full alternative

   Complete neutral fictional source: A fictional badge cupboard has 364 badges. Another parcel supplies 278 badges of the same kind. Count each badge once. The task is to find the new total; no actual stock or delivery is claimed. Four exact own prompts, in order: 1. What does each count represent? Write a number sentence for the new total. 2. Find the total using a way you can explain or show. 3. Show why any regrouping in your way keeps the amount unchanged. If your way uses no written regrouping, describe crossing a ten or hundred. 4. Give a connected check and state what your total counts. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

   Rights

   Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

10. Id

    V10

    Title

    A fictional paper store · neutral source and my turn

    Role

    Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

    Complete source

    An imagined paper store starts with 704 cards and uses 168 cards once. Find the cards left. This is a different opportunity after teaching, not an equal-difficulty test form or a progress measure.

    Full alternative

    Complete neutral fictional source: An imagined paper store starts with 704 cards and uses 168 cards once. Find the cards left. This is a different opportunity after teaching, not an equal-difficulty test form or a progress measure. Four exact own prompts, in order: 1. What does each count mean, and what number sentence finds cards left? 2. Find cards left using a strategy you can show. 3. A made-up note says “subtract each smaller digit from each bigger digit, so 704−168=664”. Keep or repair this method with a reason. 4. Check your result and explain what it counts. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

11. Id

    V11

    Title

    The missing refill · neutral source and my turn

    Role

    Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

    Complete source

    A fictional kit needs 725 labels in total. It has 468 labels available. Find the further labels needed: 468+□=725. The box stands for a whole-number value. No real refill is supplied.

    Full alternative

    Complete neutral fictional source: A fictional kit needs 725 labels in total. It has 468 labels available. Find the further labels needed: 468+□=725. The box stands for a whole-number value. No real refill is supplied. Four exact own prompts, in order: 1. What does the box count? Describe the known part and the whole. 2. Find a value for the box with a useful strategy. 3. Put your value into the original equation and check it. 4. A fictional note says “the box is 725 because that is the answer after the equals sign”. Keep or repair it with a reason. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

12. Id

    V12

    Title

    Two missing roles · neutral source and my turn

    Role

    Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

    Complete source

    Two separate fictional records use cards. Record 1:□−175=428, where 175 cards are used and 428 remain. Record 2: 620−185=□+240. Keep the records separate. There is no supplied history of a learner’s earlier work.

    Full alternative

    Complete neutral fictional source: Two separate fictional records use cards. Record 1:□−175=428, where 175 cards are used and 428 remain. Record 2: 620−185=□+240. Keep the records separate. There is no supplied history of a learner’s earlier work. Four exact own prompts, in order: 1. For Record 1, say what the box counts and find it. 2. Substitute your Record 1 value into its original equation and check. 3. For Record 2, find the box value. Show what the complete known side is first. 4. Check both full sides of Record 2 after substitution. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

13. Id

    V13

    Title

    A handout supply decision · neutral source and my turn

    Role

    Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

    Complete source

    An invented display needs 485 handouts. It has 268 handouts in one pile and 124 in another, counted once. Decide whether the supply meets the need. No real print stock or event is observed.

    Full alternative

    Complete neutral fictional source: An invented display needs 485 handouts. It has 268 handouts in one pile and 124 in another, counted once. Decide whether the supply meets the need. No real print stock or event is observed. Four exact own prompts, in order: 1. What question would settle whether the supply is enough? Write a model with units. 2. Find the exact available count and the amount missing or extra. 3. Make the decision in terms of the source. 4. A made-up note says “about 270+120 is 390, so we know the exact shortfall is 95”. Keep or repair it. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

14. Id

    V14

    Title

    A close pretend budget · neutral source and my turn

    Role

    Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

    Complete source

    A fictional Australian-dollar budget is $300. Two invented whole-dollar costs are $148 and $153. There are no other costs in this model. These are not current prices, personal finances or a purchase invitation.

    Full alternative

    Complete neutral fictional source: A fictional Australian-dollar budget is $300. Two invented whole-dollar costs are $148 and $153. There are no other costs in this model. These are not current prices, personal finances or a purchase invitation. Four exact own prompts, in order: 1. Write a model for the combined cost and its comparison with the budget. 2. Give a nearest-ten estimate and state its purpose. 3. Calculate exactly and decide whether it fits. State the money left or excess. 4. Give an exact check and explain why the rough estimate alone was insufficient here. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

15. Id

    V15

    Title

    A note of your own · neutral source and my turn

    Role

    Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

    Complete source

    Choose an imaginary collection or whole-dollar plan. Choose a start count from 100 to 900 and an added count from 10 to 300, both in the same unit. Ask for the combined amount or ask whether it meets a separately chosen target from 200 to 1200. State all chosen conditions. No real possession, purchase or completed activity is required.

    Full alternative

    Complete neutral fictional source: Choose an imaginary collection or whole-dollar plan. Choose a start count from 100 to 900 and an added count from 10 to 300, both in the same unit. Ask for the combined amount or ask whether it meets a separately chosen target from 200 to 1200. State all chosen conditions. No real possession, purchase or completed activity is required. Four exact own prompts, in order: 1. State your chosen conditions, units and the question you want to answer. 2. Make a number sentence or model for your question, keeping the roles clear. 3. Solve exactly and explain what the result means. 4. Choose a connected check. What would you keep, change or try next? Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

16. Id

    V16

    Title

    One useful changed plan · neutral source and my turn

    Role

    Neutral held source plus four genuine empty areas; 32 total empty interiors, source exposure tracked

    Complete source

    Make a new fictional additive plan with start 100–900, added 10–300, same unit; optional target 200–1200. Or change one stated condition of an actually available earlier plan, keeping all current conditions complete and in range. Earlier work may be visible; if absent, start anew. No matched difficulty or learning gain is supplied.

    Full alternative

    Complete neutral fictional source: Make a new fictional additive plan with start 100–900, added 10–300, same unit; optional target 200–1200. Or change one stated condition of an actually available earlier plan, keeping all current conditions complete and in range. Earlier work may be visible; if absent, start anew. No matched difficulty or learning gain is supplied. Four exact own prompts, in order: 1. State all current conditions and identify any new or unchanged part. 2. Formulate and calculate the current wanted quantity with a useful strategy. 3. Interpret the current result in its situation. If a target is chosen, say whether it is met. 4. Give a connected check or one wanted next change. Say what has been worked out and what is still proposed. Each response area is genuinely empty; no sample answer, equation, strategy, faint model or watermark appears inside it. Staff criteria and next lessons are separate.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

17. Id

    V17

    Title

    My place-value or strategy space

    Role

    Genuine empty own aid

    Complete source

    Original blank own aid; no supplied numerical source or answer.

    Full alternative

    My place-value or strategy space. Four labelled, completely empty areas: My quantities and unit; My representation or strategy; My result and meaning; My check or next move. Use for ordinary addition/subtraction, not a printed adult model. No values, answers, diagrams or claims of completed work are supplied. Write, draw, type in an accompanying page or use your usual communication; filling every area is optional.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

18. Id

    V18

    Title

    My part and whole

    Role

    Genuine empty own aid

    Complete source

    Original blank own aid; no supplied numerical source or answer.

    Full alternative

    My part and whole. Four labelled, completely empty areas: My complete source and question; My known part and wanted part; My calculation or description; My original-equation check. No scale, predetermined parts, values or answer. Child chooses a useful representation. No values, answers, diagrams or claims of completed work are supplied. Write, draw, type in an accompanying page or use your usual communication; filling every area is optional.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

19. Id

    V19

    Title

    My two versions

    Role

    Genuine empty own aid

    Complete source

    Original blank own aid; no supplied numerical source or answer.

    Full alternative

    My two versions. Four labelled, completely empty areas: First complete conditions and work; First check or interpretation; Second complete conditions and work; Second check or wanted next move. A second version is optional; blank first/second spaces do not supply history. No values, answers, diagrams or claims of completed work are supplied. Write, draw, type in an accompanying page or use your usual communication; filling every area is optional.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

20. Id

    V20

    Title

    A current local example

    Role

    Genuine empty own aid

    Complete source

    Original blank own aid; no supplied numerical source or answer.

    Full alternative

    A current local example. Four labelled, completely empty areas: Source, publisher, place, date, checked date and unit; Actual fact or authorised observation; Clearly fictional or future assumption and wanted question; My model, result, check and limits. An adult reviews the full primary source/permissions before use. No real local fact, stock, price or child data is prefilled. No values, answers, diagrams or claims of completed work are supplied. Write, draw, type in an accompanying page or use your usual communication; filling every area is optional.

    Rights

    Original planned geometry and prose ©NeuroForgeIO Pty Ltd 2026, CC BY 4.0; curriculum/source text stays under its own notices. No banknote designs, logos, cultural motif or pupil-image copying.

Paths

../tool/index.html; ../tool/paper.html; ../tool/manual-versions.html; ../assets/V01.svg through V20.svg with PNGs and complete alternatives. Held own pages match V09–V16.