Place Value Labundergrad · Placevaluelab: Magnitude, Regrouping, and Scientific Notation Foundations

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Place Value Lab

StudentChoose a mission, make a prediction, test the model, then explain the evidence.

TeacherLook for misconception tags, evidence-step completion, and transfer-readiness signals.

place value lab · placevaluelab_bridge

Placevaluelab: Magnitude, Regrouping, and Scientific Notation Foundations

Bundling regroups the tokens. Shifting scales the amount. Figure out which move changes what — then try to make a zero appear.

Invariant witness: the amount bar judges every regroup and shift; trap missions surface MISC-PV tags.

PredictTestExplainReviseDefendTransfer0/4 evidence steps

hundred-thousands0

ten-thousands0

thousands0

hundreds0

tens0

ones0

tenths0

hundredths0

amount

0/2000

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The data prints here after you commit.

nothing prints before a committed call

move log

No moves yet — drop tokens, fill a column past nine, then bundle.

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