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iRubric: Balsa Wood Bridges rubric

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Balsa Wood Bridges Bridge Building All bridges must be made out of popsicle sticks, glue, tape, straws, and/or paper. The bridge must span distance of 30 centimetres. Rubric Code: P2264X5 By dstiglitz Ready to use Public Rubric Subject: Engineering Type: Project Grade Levels: (none)

Strong and Stable Structure:
	Level 1 10 pts	Level 2 15 pts	Level 3 20 pts	Level 4 25 pts
Appearance	Level 1 Not aesthetically pleasing (shapes, patterns, colour, etc.) Work is sloppy throughout. Design is unattractive and/or plain.	Level 2 Limited aesthetics (shapes, patterns, colour, etc.) Design and use of glue is messy at times. Some visual appeal. glue use..messy	Level 3 Overall, an attractive bridge (shapes, patterns, colour, etc.) Tidy work most of the time. Visually appealing.	Level 4 Extremely aesthetic in design (shapes, patterns, colour, etc.) All constuction is clean and attractive. Visually appealing.
Structure	Level 1 Bridge with limited design. Does not span a gap of 30 centimetres (unstable or incomplete). Did not maximize use of materials.	Level 2 Bridge with some creative design. Spans a gap of 30 centimetres, but remains unstable or incomplete in some way. Limited use of materials.	Level 3 Bridge designed with good creativity. Spans a gap of 30 centimeters, is complete and stable. Good use of materials.	Level 4 Bridge designed with excellent creativity. Spans a gap of 30+ centimeters is complete and stable. Excellent use of materials.
Weight	Level 1 Bridge broke before weight was added	Level 2 Bridge held 2 ponds before breaking	Level 3 Bridge held up to 6 pounds before breaking	Level 4 Bridge was able to hold more than 10 pounds before breaking
Truss Design	Level 1 No specific truss design present	Level 2 Bridge resembles a style of truss, but not throughout the design	Level 3 There is a clear resemblance to a truss bridge design, mostly followed	Level 4 The bridge is a replica of a truss design throughout the whole bridge
Bridge Design Explanation	Level 1 No explanation for design choice	Level 2 Design choice made, but no reason for why you chose this style	Level 3 Design choice made and simple description	Level 4 Design choice made and clear reasoning as to why this style bridge was chosen for the project.
Reflection	Level 1 No reflection	Level 2 Talks about the bridge but not descriptive	Level 3 Talks about the bridge design and the process.	Level 4 Reflection talks about the positives and negatives of the bridge and design process in detail.