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iRubric: Balsa Wood Bridge Construction Project rubric

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Balsa Wood Bridge Construction Project Balsa Wood Bridge Construction Project Students design and build a balsa wood bridge that will hold the most weight and also be the lightest in the class. Rubric Code: ZXC7966 By msheena Ready to use Public Rubric Subject: Engineering Type: Project Grade Levels: 9-12

Bridge project
	Excellent 4 pts	Good 3 pts	Average 2 pts	Fair 1 pts	Total Score Comments (N/A)
Sketch 15 pts Students need to draw a sketch of each side	Excellent Sketch was complete and neat.	Good Sketch was missing parts.	Average Sketch was missing parts and was sloppy.	Fair No sketch completed.	Total Score
Mathmatics 15 pts Students need to measure and calculate the number of sticks needed	Excellent Calculations were precise	Good Calculations were short by only 1 stick	Average Calculations were off by 2 sticks	Fair Calculations were off by more than 2 sticks	Total Score
Truss bridge 15 pts Make a symmetrical truss bridge	Excellent Bridge is symmetrical.	Good Bridge is somewhat symmetrical.	Average Bridge is not very symmetrical.	Fair Bridge is poor and not symmetrical at all.	Total Score
Design of bridge 15 pts Final build of bridge	Excellent Design matched original sketch, angles were cut neatly and glue was not overly used.	Good Design was close to original sketch, most angles were cut neatly, and glue was used properly.	Average Design did not match the original sketch, bridge was sloppily built, and glue was everywhere.	Fair Design was never completed.	Total Score
Final appearance 15 pts How bridge looks overall.	Excellent Bridge appearance is awesome.	Good Bridge looked pretty good.	Average Bridge was basic and functional.	Fair Bridge was poorly built.	Total Score
Strength to weight ratio 15 pts Divide weight held by weight of bridge.	Excellent Strength to weight ratio was between .80 and 1.0. Grade will range from 93-100.	Good Strength to weight ratio was between .79 and .51. Grade will range from 86-92.	Average Strength to weight ratio was between .50 and .25. Grade will range from 76-85.	Fair Strength to weight ratio is lower than .24. Grade will range from 70-75.	Total Score