What are the rules for coaches interaction with players in off season??

[DWB]

I, like perhaps others, don't really know what a coach can, and cannot do with players during the off season. I know about the physical conditioning stuff, but I'm talking X's & O's, and player development skills. 

Can coaches "watch" pick up games in open gym? Can coaches select teams for open gyms? Just how far can they go with the team, vs what can they do with individual players?

 

[bigrod]

I can't claim to know all the exact rules, but my understanding is that they are pretty limited on instruction time and limited on how many players they can coach at a time (for some reason, 4 was sticking in my head). I'm sure others know more that I do about this.

[Uspshoosier]

https://www.ncaa.org/sites/default/files/20-Hour-Rule-Document.pdf