| When | Change | Evidence | Session |
|---|---|---|---|
| 2026-10-13 | Secure → Secure | 13 Oct mixed set, cold, non-calc, no cue: pencil 7 cm to the nearest cm, length L: wrote 6.5 at most x less than 7.5, bounds and both signs right, letter x not L, 4 min, 1/1 unaided. Then drew it on paper with L: filled circle at 6.5, open ring at 7.5, joined. Fifth clean error interval; first one drawn on a number line. | session 99 |
| 2026-09-29 | Secure → Secure | 29 Sep starter, non-calc: 4.6 kg to 1 d.p. → '4.55 <= w < 4.65' ✓ unaided, correct symbols and variable. Fourth clean error interval (2, 11, 21, 29 Sep). | session 56 |
| 2026-09-21 | Secure → Secure | audit: bar met in session 34 — third clean independent error interval (2, 11, 21 Sep): 3.7 kg to 1 d.p. → 3.65 ≤ w < 3.75, correct notation and variable named, unaided. | standalone |
| 2026-09-21 | Secure → Secure | 21 Sep starter, non-calc: 3.7 kg to 1 d.p. → 3.65 ≤ w < 3.75, notation and variable correct. Third clean independent error interval (2, 11, 21 Sep). | session 34 |
| 2026-09-11 | Developing → Secure | 11 Sep starter: 12.4 kg to 1 d.p. → 12.35 ≤ w < 12.45, inequality notation correct and variable named. Second clean independent answer after 2 Sep; the notation gap from the 19 Aug exit check now looks closed. | session 19 |
| 2026-09-03 | Developing → Developing | 2 Sep starter: error interval for 8.6 cm to 1 d.p. given as 8.55 ≤ x < 8.65 with correct inequality notation — the exact gap that cost a mark on the 19 Aug exit check. One question only, so no promotion. | session 2 |
No marked question has been recorded against this topic yet.