I'm a secondary trained PE teacher working overseas, so don't have formal training in this age group. I have worked with Reception age/Yr 1 for the last 10 years so have some experience I would say adhere to the following: Don't expect it to be too structured (ie 'make up 3 moves where your body is rolling') but you can teach some skills formally (pencil roll, egg roll, jumps with shapes off the bench). It HAS to be fun, and there can be some exploration on their part. I do have 1 unit of free play where I get out bigger equipment (wall frames, tables, benches, inclined benches, boxes) but I give guidelines/rules as to what they can/cannot do (ie don't jump or climb higher than 'X', only jump from height onto 'spongy' mats (mini crash mats) and not onto 'skinny' mats (normal gym mats). Create 3 or 4 work areas which are different to each other and let them have 5 to 10 minutes on each, rotating round. It should be more about free play and (safe) experimentation IMHO Hope this helps and it is the best I can explain it.