iRubric: Gumball Machine rubric

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Gumball Machine Gumball Machine Students design a gumball machine that will allow selection of specific size gumball. Rubric Code: EX77233 By rvanderah Ready to use Public Rubric Subject: Science Type: Assignment Grade Levels: 9-12

Gumball Machine Design
	Poor (N/A)	Fair (N/A)	Good (N/A)	Very Good (N/A)
Engineering design	Poor Design does not allow for size selection.	Fair Design attempts to allow for size selection but it is still somewhat random.	Good Design allows for size selection but does not function well.	Very Good Design allows for size selection and functions well as designed.
Reasoning Materials and design explained	Poor Reasoning present but shows a lack of effort and insight into the design. Necessary components are absent. Obvious flaws to design.	Fair Reasoning present but does not reflect the design or is very disconnected. Missing key explanations of design or materials chosen.	Good Reasoning present but needs more details.	Very Good Well described reasoning behind design and material selection. Shows well thought out with attempts made to better the product after initial testing and design.
Engineering process Followed process of design, build, test, refine to problem solve	Poor Failed to follow the basics of the design process.	Fair Followed design process but didn't want to make necessary improvements or adjustments in design or materials.	Good Followed design process made some improvements but gave up before machine worked well.	Very Good Followed design process continued to make improvements seeking to make machine work very well- not just good enough.