Double number line missing values variation ladder
Double number line missing values variation ladder grows by changing representation, numeric range, constraint count, distractors, language load, and transfer context.
Variation ladder
1Foundation recognitionThe simplest observable decision behind the task.
2Guided strategyScaffolded model before the final decision.
3Core taskDirect solution of the target task.
4Transfer formSame mathematical idea through a shifted representation or context.
5Challenge extensionExtra reasoning step or explanation after the core answer.
6Advanced enrichmentConcept-level extension inspired by enrichment sources, rewritten as original content.
Hints and checks
Decision restated without adding a new method.
Common slip nudge: Uses the same additive jump where a multiplicative relationship is required.
One useful scaffold after help is requested.