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iRubric: Plastic straw Bridge rubric

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Plastic straw Bridge Plastic straw Bridge Arch or beam bridge to be made out of plastic straws, toothpicks, and tape. Width must be 25 cm. The bridge must support a toy car. The car can not fall off the bridge and the bridge must not collapse. The bridge must be able withstand a minimum weight of a small toy car without failing or sagging more than five cm. Rubric Code: E2WW5AA By aransom Ready to use Public Rubric Subject: Science Type: Project Grade Levels: 6-8

Forces Acting on Structures: Plastic straw Bridge
	Level 1 (N/A)	Level 2 (N/A)	Level 3 (N/A)	Level 4 (N/A)
Appearance	Level 1 Not aesthetically pleasing (shapes, patterns, strength, etc.) Work is sloppy throughout. Design is unattractive and/or plain.	Level 2 Limited aesthetics (shapes, patterns, strength, etc.) Design and use of tape is messy at times. Some visual appeal.	Level 3 Overall, an attractive bridge (shapes, patterns, strength, etc Tidy work most of the time. Visually appealing.	Level 4 Extremely aesthetic in design (shapes, patterns, strength, etc. All construction is clean and attractive. Exceptionally visually appealing.
Structure	Level 1 Basic beam bridge (no real design). Does not span a gap of 50 centimetres (unstable or incomplete). Width is not at least 10 centimeters. Did not maximize use of materials (e.g. many straws, tape, toothpicks leftover).	Level 2 Beam or arch bridge with limited creative design. Spans a gap of 50 centimeters, but remains unstable or incomplete in some way. Width is at least 10 centimeters. Good use of materials.	Level 3 Beam or arch bridge designed with good creativity. Spans a gap of 50 centimeters, is complete and stable. Width is at least 10 centimeters. Very good use of materials.	Level 4 Arch bridge designed with excellent creativity. Spans a gap of 50 centimetres is complete and stable. Width is at least 10 centimetres. Excellent use of materials.
Weight Held	Level 1 Failed by toy car falling off or bridge collapsing.	Level 2 Successfully supported toy car.	Level 3 Supported toy car.	Level 4 Supported toy car.
Teamwork	Level 1 Partners ..no team work.. one person ran the show! No respect shown.	Level 2 Partners ..some team work. Some respect shown.	Level 3 Partners were working together, but occasionally distracted from their project in some way. Respect was observed most of the time.	Level 4 Each person was actively involved in the building process. All partners were treated with respect.