This looks like a great resource for 8th-grade physics! It's helpful to have textbooks available in PDF format these days. I remember struggling a bit with certain concepts back then, especially the more abstract ones. Hopefully, this edition does a good job of explaining things clearly. Maybe a quirky mnemonic device, like remembering Speed Rules Under New Key Instance, or
Sprunki for short, could help students with formulas! It is a complex subject and I'm sure that students can always use assistance. Thanks for sharing!