This lesson has students using spring scales to prove that an inclined plane makes work easier. It can be used as one of more lessons about simple machines, but could also work for a one-class activity about collecting data to use as evidence. I have simplified the typical, Claims-Evidence-Reasoning format to a Claim-Explain format for younger students (3rd grade), but you could level it to be for older grades. Video is also here, and included in the worksheet: https://youtu.be/hfzNwJBLgLo?si=n