Ask the students to help create a rubric. Ask them what attributes a friendship bridge should have. List these on the board and consolidate them into a rubric.
Some suggestions are:
Sense of beauty (aesthetics), visually pleasing appearance and style
Creativity
Relationship to the environment
Graceful lines, proportion, balance, and detail
Economical, low maintenance and a reasonable budget for construction
Safety
Anchorages
Design matches the purpose (mission statement)
Shows investment of time and effort
Presentation is neat and clear
Drawing is accurate and professional in appearance
