My 4th grader made these two errors on t
Question
My 4th grader made these two errors on tonight's geometry homework:
- 'Find perimeter of an 8m by 5m garden' -> wrote 40 m (did 8 × 5).
- 'Find perimeter of a 10in by 6in frame' -> wrote 60 in (did 10 × 6).
Both times he multiplied length by width (area) instead of adding all 4 outer sides for perimeter.
Our timezone is America/New_York.
Can you:
- Cluster these two misses into a single 5-line cause card (prompt, wrong, right, tag, cause)?
- Set a daily 19:00 review reminder in America/New_York?
- Provide one parallel self-test problem to practice tonight?
Answer
One card written (id `f3bae9ef0d805bbe`). Both misses are the same cause, so they go on one card, not two.
The five lines on it:
| line | content |
|---|---|
| Prompt | Find perimeter: 8m × 5m garden (wrote 40m); 10in × 6in frame (wrote 60in) |
| Wrong move | Multiplied length × width (area) instead of adding all 4 outer sides |
| ight move / parallel self-test | Perimeter = 2 × (length + width). Try this: a 7m × 3m yard → 2 × (7 + 3) = 20m, *not* 7 × 3 = 21m. |
| Tag | perimeter |
| Cause | *(left blank — no geometry cause id assigned)* |
eminder: a 19:00 daily review is already running in America/New_York (`schedule_id a33d98ab-…`). Next fire is 19:11 tonight (the platform shifts a few minutes to avoid the on-the-hour spike). Stop it any time by saying "stop the reminder".
Tonight's practice — cover the card, try first, then flip:
> A 7m by 3m yard. What is its perimeter?
If you'd like the *why* behind perimeter-vs-area walked through (not just the repair), that's a homework-tutor pass — say the word and I'll hand it off there.