Iteration: Test & Evaluate
Once students have completed their redesign, they build again. You can review page 13 to refresh your memory of the build step. The iterative process continues as students test and evaluate their design once more to see if the new version better meets the criterion.
Reflect on the second water filter video on page 15. Recall how a student expressed sadness over the class stopping after two filter iterations and how all the students raised their hands to express interest in redesigning their filters again.
How did Ms. Salchli create a class that embraces the open-ended nature of the engineering design process? How did she convey that the process is never complete and you can always keep iterating?
