Knowledge atom
Solve word problems involving time intervals
Solves start, elapsed, and end-time problems in context, including finding an unknown start time.
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
3.MD.A.1
Prerequisites
Common misconceptions
- handles end-time problems but not start-unknown ones
Required evidence
These evidence lanes define what would count toward this atom.
EvidencePerformanceStatusNext step
Apply the ideaUse the idea in a new situation Not startedCollect one observation
Recent evidence
No evidence recorded yet
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