My school is short on money/personnel so this year I'm stuck teaching P-2 to P-4 without a Thai teacher to act as a referee. It's been a nightmare so far, yesterday had to call in a Thai teacher because a girl got punched in the face by a boy, and on Friday one child bit another. Too much of a circus for meaningful classes, I can't even keep them seated.
Any ideas would be appreciated please.

The Thai teacher's disciplinary system is hitting them (yea I know its illegal) and obviously I'm not doing that.