The scissor leg takedown is a complex move that your students should have great control with when practicing with classmates. Although risky, this technique could be used to defend against a straight punch.
Self Defense | Takedown
Successfully learn to takedown an opponent using techniques such as double leg takedowns, single leg takedowns, and high crotch takedowns. Gomez also goes into great detail about the flying armbar, defending the double and single leg, and Thai Cling.