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iRubric: Factor Tree rubric

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Factor Tree Factor Tree Students will create a factor tree and write an explanatory paragraph of the steps they used to factor the number. Rubric Code: KX69328 By jengrant Ready to use Public Rubric Subject: Math Type: Project Grade Levels: K-5

Factor Tree Leaves
	Excellent 4 pts	Good 3 pts	Fair 2 pts	Poor 1 pts
Factor Tree	Excellent Tree begins with a composite number; factor tree is complete and correct; no mistakes.	Good Tree begins with a composite number; factor tree is complete with one mistake.	Fair Tree begins with a composite number; factor tree contains two mistakes.	Poor Factor tree is incomplete and/or contains more than two mistakes.
Prime Factorization	Excellent Includes all required elements; factors are all primes; ordered from least to greatest	Good Includes all required elements; factors are all primes; some are ordered from least to greatest.	Fair Missing one or two required elements. some of the numbers are primes; not ordered from least to greatest.	Poor Missing many elements or not completed. numbers are not primes; not ordered from least to greatest.
Justification	Excellent Explanation is in paragraph format, describing the step by step process used to solve.	Good Step by step explanations are complete and correct but are not in paragraph format.	Fair Explanations are provided but are incomplete; More detail is needed in response.	Poor Explanation is missing or explanations provided are unsatisfactory and incomplete.
Grammar	Excellent Excellent use of math vocabulary; no mistakes are made with conventions.	Good One to two mistakes made in conventions. Some math vocabulary used.	Fair Three or more mistakes made with conventions. Needs a great deal of improvement and revision in order to be fully understood. Few math terms used.	Poor Major mistakes made with conventions. Elements in explanations are missing or are not legible. No appropriate math vocabulary used. Unsatisfactory.