Study how Modesty Blaise beat big male attackers in those thrillers by Peter O' Donnell. I'm half serious: some of those techniques might help, but Modesty was a mistress of unarmed combat, as well as a deadly shot.
She made good use of a little wooden handle called a kongo stick, too, to strike at nerve centers. She sometimes used it as a detachable purse handle, to disguise what it was.
The only time I wrote a female fight scene (in fan fiction), my heroine (Finn, from The Lost World) sliced back with her right hand to strike a male assailant in a very sensitive area. She spun, gave him a knee in the jaw, and slammed her hands over his ears, then after he fell, she gave him a hard judo chop in the throat.
She was wearing a S&W M&P .38 with five-inch barrel, but was sneaking around in a temple of the dreaded Tecamaya tribe and couldn't fire a shot that'd alert other guards.
Hey: it was fun to write! I did include a disclaimer, warning readers NOT to try this in horseplay. It's best to do this only in extremis, when deadly force is truly warranted.
Finn was 5' 7" and about 117 pounds, so she had to do drastic things fast. If that Indian had captured her, she'd probably have been sacrificed to Aztec-like gods or been a plaything for the grim First Speaker.
Seriously, it's a pity that teachers have to worry about this stuff but you do. My mother once taught a class after integration began here that included some bused students who were arrested for murdering a store clerk during a robbery. School isn't what it was when I attended.
