iRubric: Pythagorean Theorem Performance Task rubric

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Pythagorean Theorem Performance Task Three right triangles surround a shaded triangle; together they form a rectangle measuring 12 units by 14 units. The figure shows dimensions but is not drawn to scale. Rubric Code: YX3W9AC By ddyerny66 Draft Public Rubric Subject: Math Type: Assessment Grade Levels: 6-8

Pythagorean Theorem
	Poor 1 pts	Fair 2 pts	Good 3 pts
Skill finding hypotenuse length	Poor Uses incorrect dimensions for triangle parts in the theorem. Also doesn't find the square root in the final step.	Fair Uses incorrect dimensions for triangle parts in the theorem or doesn't find the square root in the final step. Calculates hypotenuse lengths accurately but work isn't complete to support their results.	Good Calculates hypotenuse lengths accurately and with work supporting their answers.
Uses the Theorem as Proof	Poor Uses incorrect dimensions for triangle parts in the theorem. (longest dimension not used as hypotenuse).	Fair Uses correct dimensions from previous work accurately but doesn't have correct conclusion from their calculations or doesn't calculate accurately.	Good Uses correct dimensions from previous work accurately and does calculations accurately and has correct final conclusions.
Explanation/Writing	Poor Writing isn't clear or correct.	Fair Writing has some accurate statements, but there are flaws in the reasoning or writing. Student's understanding of the material isn't demonstrated to a mastery level.	Good Writing is clear to the reader and is accurate for the mathematics. Student demonstrates ability to communicate their understanding using writing.