@sayjay9274 I am a 5th grade Physical Education Teacher. So within the age range.
I take them through 'athletics' workouts & a 'strength & conditoning' workout. They use Kettlebells, run around, hop around, throw stuff, etc.
The biggest things I recommend are going to be incentivizing movement through some kind of gamification of the workout. S&S is a very (no offense) boring workout that requires higher skill & coordination due to the get up & hinging being tough for kids to properly learn.
I started off teaching my kids how to hinge properly by having them practice throwing a light ball behind them hard as possible. Showing how far it can be thrown using just your arms, then look how far you can throw when you bend over & use your legs.
I'd pair the kids together - one does the throw, the other runs to get it. Set a timer of them alternating for like 2 minutes of something.
Get to the weights then and hammer the basics. Empty hinges, get down the squat pattern correctly, get them understanding push up position even if they can't do a push up yet - the tension from the Plank is a great learning tool for them to understand bracing later.
The key to all this is being patient with the kids. Kids get very discouraged & if you expect them to be able to hop on a set program immediately you're going to be annoyed with their lack of discipline. Use timers, use games, use kindness and when needed, use aggression or motivation.
They can push harder. They can be better than yesterday & you can get them there.
If you have any other questions feel free to ask. But in essence - get them moving athletically through running, hopping, throwing. Then add the weights slowly, teaching them proper mechanics first & make games of it. 'I go, you go,' etc.