Broken ankle

My 15 year old son whos focus this your was to be the decathlon broke his ankle in the last week of basketball a couple of days ago it was a clean break and they say it should heal well. Any suggestions of what to do while still in a cast and shortly there after.
Thanks for your reply

on the supplement side, i would suggest keeping the calcium up through dietary or supplemental means and look into adding 3-8grams of MSM powder daily. both will help with the recovery of the bone.