Hexadecimal taken from Tuesday's two unanswered questions to conversions right in all four directions; the why-hex sentence reached 1 of 2 and she stopped ('times up') before the paper exit set. Ran ~09:24–10:40 against block 22 (ends 10:20), one movement break of unknown length. Session 58's unfinished hex came first, so the week's planned end-check loop was not reached. Starter, no notes, 4 set / 4 attempted / 4 unaided / 0 blank: 10110010 → 178 (total only, no working line); 90 → 01011010 with columns once asked; 01101110 + 00110111 → 10100101, six carries named, checked as 165 unprompted; 'until the total is over 100' → while total < 101: with the colon. Hex opener finished: D → 13, 1011 → 11. Binary↔hex taught: 11 → B, 0100 → 4; two say-backs in her own words (split in the middle; add each side and write its hex symbol); guided 01111010 → 7A; alone 11001111 → CF with both sums (wrote C = 10 in the working, fixed to A when asked); A6 → 1010 0110 alone. Decimal↔hex via binary, route displayed: 172 → 10101100 with the sum, then A and C (not joined as AC); 2F → 47 via 00101111 (minus signs typed for plus). Why hex is used: the open question drew the storage misconception; narrowed questions 3/3 (4 bits; 8 and 2 digits; the 8-digit one has more chances to slip); the 2-mark sentence gave the point and corrected the storage idea but no consequence, 1/2; the follow-up frame was set and not answered. 24 items attempted, 0 blank, 21 right first time. D03 notstarted → developing. Nothing handwritten photographed.
FIRST: finish the why-hex sentence — same frame: 'hex uses fewer digits, so people ______' — then the full 2-mark answer with no frame. Then the hex set by hand on paper, photographed, working shown, no route displayed: 11010110 to hex; 5E to binary; 200 to hex; 9C to decimal. Starter, no notes: one binary-to-decimal (does the adding-up line appear unasked?), 'does hex save memory, yes or no, and why', one binary addition by hand with the overflow sentence. THEN the loop that checks at the end (while True with break; REPEAT…UNTIL in the exam's pseudo-code): worked example line by line with say-backs, one trace and one production item, Code Lab 'Translate the pseudo-code' capped at 3 runs, then a handwritten while loop with no checklist. That loop has been owed since 25 Sep; give it the next coding block whole once hex is closed.
Why-hex sentence: follow-up frame 'it uses fewer digits, so people ___' set and not answered (first try 1/2: point, no consequence). Paper exit set for hex (all four directions, by hand, photographed) not run.
| Topic | Name | Change | Evidence recorded |
|---|---|---|---|
| D03 | Not started → Developing | taught / confirmed / applied, 1 Oct. Teach 4/4 (D → 13, 1011 → 11, 11 → B, 0100 → 4). Confirm: two say-backs in own words (split down the middle; add each side, write the hex equivalent), guided 01111010 → 7A. Apply unaided: 11001111 → CF with both sums; A6 → 1010 0110; 2F → 47 via 00101111; 172 → 10101100 → A and C in two set steps. 4/4 values right, typed. notstarted → developing, one level. | |
| D01 | Gap → Gap | 1 Oct, why hex is used. Open question drew the storage misconception (easier to store, can store more), corrected. Narrowed: one hex digit replaces 4 bits; 8 and 2 digits to copy; the 8-digit one gives more chances to slip, 3/3. 2-mark sentence frame: 'uses less space on paper' plus 'the pc can only store binary': point present, consequence absent, 1/2. Follow-up 'so people ___' set, not answered at the stop. Below the bar: stays gap. | |
| D02 | Developing → Developing | 1 Oct starter, no notes, 2 days on: 10110010 → 178 correct, total only with no adding-up line; 90 → 64, 16, 8 & 2, 01011010 correct with columns once asked. Also 172 → 10101100 = 128 + 32 + 8 + 4 inside the hex work. 3/3 unaided, typed. Not moved: the secure retest is owed by hand with working shown, and the working line did not appear unrequested. | |
| D05 | Developing → Developing | 1 Oct starter, no notes: 01101110 + 00110111 → 10100101, six carries named by column (2, 4, 8, 16, 32, 64), checked as 165 in decimal unprompted. 1/1 unaided, typed; asked to work on paper, no photo seen. Overflow sentence not asked. | |
| P05 | Developing → Developing | 1 Oct starter, no notes: 'keep going until the total is over 100' → while total < 101: — boundary right and the colon present (missing 25 and 29 Sep). 1/1 unaided, typed. Condition-at-end form still untaught: the block went to finishing hex. |