iRubric: STEM Hydraulic Arm Rubric

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STEM Hydraulic Arm Rubric

Working in teams the students are going to build a hydraulic catapult arm.

Rubric Code: E2W4849

By Snowberry

Draft

Public Rubric

Subject: Science

Type: Project

Grade Levels: 6-8

Group Insulation Research
	Excellent (N/A)	Good (N/A)	Fair (N/A)	Poor (N/A)	Not completed 0 pts
Effectiveness Mechanical ARm	Excellent The arm can fling an object more than 24 inches.	Good The arm can fling an object more than 12 inches	Fair The arm can fling an object more than 8 inches	Poor The arm was not able to move at all	Not completed Arm not completed
Improvement	Excellent The group had more than 1 good idea of how to improve the model. The group included a drawing/sketch of that improvement.	Good The group 1 design improvement and included a detailed drawing/sketch.	Fair The group had no ideas to improve the gearbot.	Poor The group did not address this part of the rubric.	Not completed There was no design plan
Mechanics	Excellent Student can explain how the hydraulic system works in the catapult. Mention of at least 2 simple machines is present.	Good Students can explain how the hydraulic system works in the catapult but only one simple machine is recognized.	Fair Students can vaguely explain how the hydraulic system works in the catapult but only no simple machine is recognized.	Poor Students cannot explain how the hydraulic system works at all.	Not completed Arm not completed
Creativity	Excellent Great care taken in construction process so that the structure follows plans accurately.	Good Construction was careful and accurately followed the plans.	Fair Construction was careful and somewhat followed the plans.	Poor Construction was somewhat careful and most aspects are different than the plans	Not completed Construction was not complete.
Base & Stand	Excellent Base is sturdy and works appropriately without help.	Good Base is sturdy but does not work without help.	Fair Base is not sturdy and does not work without help.	Poor Base does not work at all. The syringe does not move the bot.	Not completed There is no base. There is no syringe.
Arm	Excellent Arm pivots in 1 places vertically using 1 to 2 syringes.	Good Arm pivots in 1 place vertically using 1 to 2 syringes but cannot throw an object.	Fair Arm does not pivot but does move vertically using at least 1 syringe.	Poor Arm does not move with the use of a syringe	Not completed There is no arm.
	Excellent	Good	Fair	Poor	Not completed