student and appears to escalate quickly. it moves into a standoff between martinez and her math teacher and escalates when martinez claims her teacher pushes her. [ bleep ]. [ bleep ]. >> she pushed me. then she started started going right after she pushed me. she started hitting me. >> reporter: what did you do in reaction? >> i hit her back. >> reporter: replaying the moment the fight starts. there is pushing. it may be hard for some to tell who lashes out first. but eventually, martinez claims, her teacher throws her to the ground, where they tangle as one student asks martinez to stop. >> please stop! >> reporter: martinez says her teacher had her pinned to the ground. school district spokeswoman diane barth says the teacher was roughed up herself and now on paid administrative leave as an investigation begins. >> it was a regrettable incident and very unusual.