Hi,
If you mean just first period I just played typhoon with my class and by the end of it they were all excited and bright eyed. Typhoon is basically a jeopardy type game done over power point. I used it for my Natural disaster lesson but you can use it for other subjects. If you do a search you'll find the template. I was really impressed by it because half the class was literally asleep and by the end they were all awake and talkative. Basically, make them competitive against each other in a fun way and you're almost guaranteed a fun class. I teach all boys 1st grade high school btw.
Good luck!!