Encourage the child to take part in exercise wherever possible, especially swimming.

Consider using lighter equipment for games etc.

Let the child choose whether or not to have adult help to perform a task.

Encourage him/her to make his/her own decisions, e.g. "Let me know if you need your coat and if you want help putting it on."

Although the child may need the help of a classroom assistant encourage him/her to let the child have independence as much as possible.  e.g. at breaktimes let him/her be with his/her friends without the classroom assistant intruding.