iRubric: STEM Hydraulic Arm Rubric

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STEM Hydraulic Arm Rubric

Students design and build a mechanical arm that lifts and moves a ping pong or golf ball using hydraulics for power. Small design teams (3-4 students each) design and build a double axis for use in the completed mechanical arm. One team designs and builds the grasping hand, another team the lifting arm, and a third team the rotation base. The three groups must work to communicate effectively through written and verbal communication and sketches.

Rubric Code: W2W652A

By jefevans

Ready to use

Public Rubric

Subject: Science

Type: Project

Grade Levels: 6-8

Group Insulation Research Enter rubric description
	Excellent 20 pts	Good 17 pts	Fair 15 pts	Poor 10 pts	Not completed 0 pts
Effectiveness Mechanical ARm Pick up a ping pong ball 25 cm in the air.	Excellent The arm could pick up a ping pong ball 25 cm.	Good The arm could pick up the ping pong ball , but could not get it up 25 cm	Fair The arm could move, but was not able to pick up the ping pong ball	Poor The arm was not able to move at all	Not completed Arm not completed
Effectiveness Mechanicx Move the ping pong ball 20 cm to the right	Excellent The arm could move the ping pong ball 20 cm to the right.	Good the arm could move the ping pong ball but not 20 cm to the right	Fair The arm could move the ping pong ball to the right more than 10 cms but less than 20 cm.	Poor The arm was not able to move the ping pong ball	Not completed Arm not completed
Plan & Improvement Plans are detailed and improved design.	Excellent The group had a detailed design plan that included measurements and labeled parts. The group altered at least 2 aspects of their design.	Good The group had a detailed design plan that included measurements. The group altered at least 1 aspects of their design.	Fair The group had a rough design plan. The group made no design changes.	Poor The group had a few pieces on the design plan. The group made no design changes.	Not completed There was no design plan
Create	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 Individual grade	Excellent Base is sturdy and works appropriately without help. The syringe makes the stand move side to side.	Good Base is sturdy but does not work without help. The syringe partially moves the stand side to side.	Fair Base is not sturdy and does not work without help. The syringe does not move the stand side to side.	Poor Base does not work at all. The syringe does not move the stand.	Not completed There is no base. There is no syringe.
Arm	Excellent Arm pivots in 2 places vertically using 1 to 2 syringes.	Good Arm pivots in 1 place vertically using 1 to 2 syringes.	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.
Hand	Excellent Hand opens and closes using 1 syringe.	Good Hand partially opens and closes using 1 syringe.	Fair Hand only opens or closes (not both) using 1 syringe.	Poor Hand does not open or close with the use of a syringe.	Not completed There is no hand.
Bonus Able to move a golf ball and able to move it back to original position	Excellent Able to move a golf ball and able to move it back to original position	Good Able to do one or the other completely, but not both completely.	Fair Able to partially do both	Poor Able to partially do one	Not completed not able to do either.

Subjects:

Science

Types:

Project

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