Progressions¶

Plan the order of mental-arithmetic themes across the school year, belt by belt, for each grade level. Organise the work into themes and subthemes, and decide at which belt each subtheme starts being assessed.

Each subtheme cell can hold a question spec (e.g. multi_direct 2-9×2-9), validated against the daemon when you confirm it: a refused spec is not stored and the reason is shown under the field. A spec that is valid yet questionable — a range wider than the question type really handles, say — is stored, with an amber ⚠ beside it whose tooltip carries the remark. Cells can be merged across belts to share a single spec.

Unlike the other tabs, Progressions is not capped to a comfortable reading width: the grid grows as wide as the browser window, so the question specs stay readable without a horizontal scrollbar. Resize the window to give it more or less room.

The merge (🔗), cancel and ? buttons sit in a small floating bar pinned to the top-right of the grid. It follows the scroll, so cells low in the grid can be merged without losing sight of them; while a merge is being built, the bar also shows how many cells are currently selected.

The grid is interactive (see the in-app ? help for the full list):

• Left-click extends or shrinks the "solo" zone for a subtheme.
• Right-click marks removal from a cell onward, or resets the row.
• Shift-click resets the whole row (thresholds and merge memberships).

For any belt, Preview assessment subject draft builds a draft from the subthemes assessed at that belt — one question per row. You can preview the YAML and Add to library so the entry becomes available in Assessments; the per-type question counts are tuned afterwards by editing the script.

A belt whose subthemes don't all carry a spec cannot produce a draft, and its button is greyed out. Pointing at it highlights the offending rows in the grid; clicking it opens a small panel, pinned to the bottom-right corner of the window, listing them grouped by theme. The panel doesn't move with the grid, and the row highlight stays on for as long as it is open, so a progression taller than the screen can be walked through without losing track. Click an entry to scroll to that row and open its spec field right away; the panel closes by itself once the last spec is filled in (and on Esc, on the ×, or by clicking the greyed button again).