Here is a useful worksheet we have used with PE and KE dealing with springs. It calculates the PE and KE of a block at three points on its course. On the first worksheet, I have included the equations on the worksheets. I have included a second worksheet exactly like the first without the equations showing for those that don't want them available to the students.
I ask for the spring constant "k" when I place a mass at the bottom of the spring. I then stretch the block and spring system additional cm and ask for the PE stored in the spring. I then release the block and the students have to calculate the maximum velocity. I also ask them the oscillation time of the spring block system. Finally I ask whether the total energy remains the same and they color in the canisters to show the PE and KE at each point, as well as the total energy. Good luck. I also have a parallel worksheet "Potential Energy and Kinetic Energy" available for a hot dog cart rolling down a hill and then up a smaller hill. All worksheets are ones we have used in class. This is a early page of a physical science workbook coming out in June 2017 by Scorton Creek. I hope this helps you. Thank you for trying our products.