Challenge: Grades 2-5 built gumdrop bridges Constraints: Only use 50 gumdrops and 100 toothpicks. Ask: What types of bridges are there? We explored 4 types of bridges in small groups and then shared out to the whole class with our foldables. What forces act on a bridge? We learned about compression and tension and how those forces effect each type of bridge. What are the pros and cons of each types of bridge? We explored the positive and negatives of each bridge by reading serveal articles and sharing out.
We planned bridges in small groups using what we learned to better our plans. Then we worked in groups to create our bridge and test them. Our least successful bridge held ZERO pennies... our most successful bridge held 134 pennies or $1.34 pennies. It was awesome! We learned the importance of having a structurlaly sound bridge. our most successful bridges were made using triangles in the bottom, top and sides. Also doubling up our toothpicks made bridges more sturdy. Some of the most beautiful bridges were the least successful. So beauty doesn't equal good!