Today you load your builds live in front of the class, so instead of claiming your build is strong you show the numbers it holds. The question is which shape or join earned the gain, meaning which change actually made the number go up. For example, a build that held 2 books and then held 5 after a brace went in.
You will load your build so the class can see the numbers. That measured result is evidence, not a feeling that it is stronger. Pick the one structural idea (the shape or join) that made the number go up. The live load-and-explain is your showcase.
What will you load, and which one idea made the biggest difference?
Open your Investigation Journal to the project pages and find the load your build held before the change and the load it held after, because those two numbers are what you will say out loud. Then agree with your group the one shape or join you will name as the difference-maker. If your numbers are already written down, use whatever time is left to practise one short, slow load together.
Each group loads its build in front of the class. Say the job it does, the number it held before, the one change you made, and the number it held after. Point to the shape or join that made the number go up while the load is still on.
If you are watching: listen for the before number, the one change, and the after number. Be ready to say whether the numbers match the claim.
Walk the other builds. For each one you visit, look at the shape or join under the load. On your Investigation Journal page, answer these three short questions:
You're previewing this lesson. Get full access to this lesson and hundreds more — each one ready to teach, with interactive activities, printable resources and pupil progress tracking built in.