Knowledge atom
Select and apply mental strategies flexibly within 20
Chooses an efficient mental route for any within-20 computation when retrieval does not fire.
Start practiceProgress & proof summary
LifecycleNot started
Evidence progress0 of 1 pieces collected
0%Current predictionNo prediction yet
Why?Next reviewNot scheduled
Mastery projection: Not available yetWhat does this mean?
Standards alignment
2.OA.B.2
Prerequisites
Common misconceptions
- applies one favored strategy universally even where it is inefficient
Required evidence
These evidence lanes define what would count toward this atom.
EvidencePerformanceStatusNext step
Tell it apartDistinguish the target from a near miss Not startedCollect one observation
Recent evidence
No evidence recorded yet
The first response record for this atom will appear here.