Where not to be standing, and how to create/maintain distance. Unless they have a complete grasp of the application of that concept, everything else is bullshit. Please spare me the horse feces (I was told shit was a 4 letter word than offends pussies) with effective striking and all that jazz being spewed out there is pretty much pointless without the core concept mentioned above
If an adult grabs your 10 year old kid with intent, things will go bad. Your kid's programs have to allocate a serious chunk of time to that. They have to understand that "come here, I wanna talk to you" has to be met by "that's fine, I can hear you from here" and that every step forward triggers 2 steps back from the kid... even better a swift escape.