Can i file assault charges against a minor on behalf of my son?

Can i file assault charges against a minor on behalf of my son?
My son is in the 7th grade and has recently been attacked by a group of 4 or more 8th grade girls who physically hit/kicked/slapped/punched him several times. They’ve made social media threats as well of bodily harm. The school has done nothing and because I raised my son to not hit a female he ends up getting physically beaten.

Can I press assault charges against all of those girls? I don’t like dealing with bullying!

Justin’s Answer
You don’t need to press charges. You can just call the police.