After-lesson extras for a local timetable, small group or home. One is enough. Use paper, speech/AAC, typed text, large/tactile pieces or a screen reader; no device, purchase or personal story is required. Day15/20 extras are after the fresh check.
| Day | Extra task | Low-material route | Check / next move |
|---|---|---|---|
| 11 | Make 3/4+1/8=7/8 in two ways: eighths and a same-whole strip. |
Fold/draw one strip. | Each representation has one whole and consistent part size. |
| 12 | Order the estimates for 4.75+2.60: 7, 8, 70. Explain which detect a decimal shift. | Spoken choices. | 7 or8 may be plausible coarse estimates;70 is not. Exact7.35. |
| 13 | Compute 1/2×1/4=1/8 by shaded overlap, then rotate partitions. |
Eight-cell rectangle. | Reversing factors keeps the product. |
| 14 | Explain 1.5÷0.5=3 and 1.5×0.5=0.75 on one number line. |
Paper tick marks. | Group count and scaling are different operations. |
| 15 | After check: find 3/5+1/10=7/10 and make a matching 0–1 sketch. |
Ten equal marks. | No held-out check value is reused. |
| 16 | Start84 as7×12 and4×21; compare prime leaves. | Factor cards. | Both produce 2²×3×7. |
| 17 | Evaluate 3³×2=54, then factor54 back into primes. |
Card list. | 3³=27, not9. |
| 18 | Show 90/150=9/15=3/5 by two valid common-factor steps. |
Written fractions. | 90/150 and3/5 have the same value. |
| 19 | Link 49=7² to √49=7, then contrast 7² with 2⁷. |
Large number cards. | 7²=49;2⁷=128. |
| 20 | After check: factor120 and169; identify which is square and verify the root. | Paper tree/grid. | 120=2³×3×5; 169=13², root13. |
These cards have not been classroom tested. Original SubjectNest extras © NeuroForgeIO Pty Ltd 2026, CC BY 4.0.