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iRubric: Dichotomous Key (Taxonomy) rubric

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Dichotomous Key (Taxonomy) Dichotomous Key (Taxonomy) Task: Students make a dichotomous key of sea shells encountered in the laboratory. Rubric Code: PX8CXW6 By avandes Ready to use Public Rubric Subject: Science Type: ePortfolio Grade Levels: Undergraduate

Button Classification
	Poor 1 pts	Good 3 pts	Excellent 5 pts
Characteristics	Poor Characteristics of the members of the group are not well described nor defined. The student repeated keys for the subsequent groupings or the student explored very few characteristics or traits.	Good Characteristics of of the members of the group are mostly well described and defined. The student explored many observable characteristics or traits.	Excellent Characteristics of the members of the group are well described and defined. The student explored a variety of observable characteristics or traits.
Branching and key	Poor Trait or traits for dividing members of the group into two groups is clearly described or defined. Key does not work.	Good Trait or traits for dividing members of the group into two groups and all subsequent groups are not clearly described; workable key but key is unclear.	Excellent Trait or traits for dividing members of the group into two groups and all subsequent groups are clearly described or defined; concise, workable key.
Presentation and mechanics	Poor Dichotomous diagram is neither clear, nor neat nor well laid out on the page. It is hard to understand the diagram. There are spelling and grammatical errors.	Good Dichotomous diagram is mostly clear, neat well laid out on the page so that it does not interfere with understanding. There are no errors in spelling or grammar.	Excellent Dichotomous diagram is clear, neat, and well laid out on the page. There are no spelling or grammar mistakes.