Today, our classroom transformed into a sail testing lab! We introduced a new engineering challenge: Can we figure out which materials make the best sails for catching wind? This question led us into a thoughtful, hands-on investigation where students predicted how different materials would perform, then tested their properties to see if their ideas held up.

To start, we reviewed what makes wind a useful energy source and talked about how engineers must carefully select materials based on their properties – like weight, flexibility, and strength. Students examined a variety of materials, including tissue paper, foil, fabric, and plastic, noting the differences and thinking about how each might behave when exposed to wind.

Together, we built a class chart titled “Materials and Their Properties,” where students recorded their observations and began comparing notes with their peers. It was exciting to see students notice how lighter materials might catch wind better – but also how too much flexibility could lead to instability. The critical thinking was in full force!

Once students had a solid understanding of the many factors that affect a sail’s performance, they were able to design, build, and test their own wind-powered creations. They had an opportunity to keep track of their Engineering Design Process and worked to improve upon their subsequent sail designs after they completed the tests of their first designs. Students went home with their very own sailboats today, and we are excited to continue our engineering and design work tomorrow as we learn about the Engineering Design Process when creating windmills!

🧠 Optional Extension Activity
Try a mini sail experiment with materials you have at home AND/OR see if your boat that you made in class today floats and can catch the wind on water! Use a small paper plate or plastic lid as a base and create simple sails using whatever you’re able to find in your own home. Blow on the sails with a straw or fan and see which material moves the farthest. Ask: