Crackers on a Plate
Anchor Papers:
Problem Solving
practitioner
Problem Solving Rationale
<p>The student's strategy of using a rekenrek to show the ten crackers and how many remain on the plate after five are eaten works to solve the task. The student's answer, "5-plate" is correct.</p>
Reasoning and Proof
practitioner
Reasoning Proof Rationale
<p>The student demonstrates correct reasoning of the underlying concepts of the task. The student's rekenrek, and scribing support correct understanding of a set of ten crackers and the need to subtract five crackers for a difference of five crackers still on the plate.</p>
Communication Level
practitioner
Communication Rationale
<p>The student correctly uses the mathematical terms <i>tens</i>, <i>number</i>, <i>equal</i>.</p>
Connections Level
practitioner
Connections RationaleCrackers on a Plate
<p>The student uses two more strategies, a tens paper strip and a number bond to show that five crackers are still on the plate after subtracting the five eaten crackers. The student does not compare the two strategies to earn the Expert level.</p>
Representation
practitioner
Representation Rationale
<p>The student's use of a rekenrek is appropriate to the task and accurate. The student's scribing defines the crackers eaten and the ones still on the plate. The student's place value strip is appropriate to the task and accurate. The student's scribing defines the crackers eaten and the ones still on the plate.</p>