Re: Please advise re: my kid defending himself
I wouldn't even give this a second thought, if it weren't for the unlucky fact they were wearing cleats. As a professional educator and former administrator (former, cos it's just not worth the pound of flesh), I think your son acted reasonably to protect himself. On the other hand:
1) Cleats raise the stakes, so this may present a teachable moment for all the things that can go wrong in a 'simple fight' (though how much of that a six year old will get... But, at least you could have the talk, and then maybe use reminders for the next few years. Fortunately, this was not during school.
2) As tsdclaflin said, the ed code (effective during school hours/events) is often stricter--usually unfairly so imho, punishing the victim as well as the abuser. I don't really have an answer for that, but tsd did a service in this area by providing the personal anecdotes.
A man, as long as he teaches, learns. -- Seneca
You students think you learn from me. I learn from you too. -- Jimmy H Woo, Kung Fu San Soo
From my teachers I learned much; from my colleagues, more; from my students, most of all. -- The Ancient Rabbi