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iRubric: Straw Bridge Challenge rubric

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Straw Bridge Challenge Straw Bridge Challenge Arch, truss, or beam bridge to be made out of plastic straws and tape. The bridge must span distance of 30 centimetres. The bridge must be able withstand a minimum of 500g of weight without failing. Rubric Code: EXB47C4 By slnolin Ready to use Public Rubric Subject: Engineering Type: Project Grade Levels: (none)

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, etc.) Work is sloppy throughout. Design is unattractive and/or plain.	Level 2 Limited aesthetics (shapes, patterns, etc.) Design and use of tape is messy at times. Some visual appeal.	Level 3 Overall, an attractive bridge (shapes, patterns, etc Tidy work most of the time. Visually appealing.	Level 4 Extremely aesthetic in design (shapes, patterns, etc. All constuction is clean and attractive. Exceptionally visually appealing.
Structure	Level 1 Basic beam bridge (no real design). Does not span a gap of 30 centimetres (unstable or incomplete). Did not maximize use of materials (e.g. many straws and tape left over).	Level 2 Beam or arch bridge with limited creative design. Spans a gap of 30 centimetres, but remains unstable or incomplete in some way. Good use of materials.	Level 3 Beam, truss, or arch bridge designed with good creativity. Spans a gap of 30 centimetres, is complete and stable. Very good use of materials.	Level 4 Arch bridge designed with excellent creativity. Spans a gap of 30 centimetres is complete and stable. Excellent use of materials.
Weight Held	Level 1 Held 0-100 pennies	Level 2 Successfully held 101-150 pennies.	Level 3 Successfully held 151-250 pennies.	Level 4 Held over 250 pennies.
Teamwork	Level 1 Partners ..no team work.. one person ran the show!	Level 2 Partners ..some team work.	Level 3 Partners were working together, but occasionally distracted from their project in some way.	Level 4 Each person was actively involved in the building process.