Could you help me with slogans?

I'm the Debate Team Captain at my high school, and I really need help coming up with interesting slogans and/or phrases to put on our call-out posters that I was JUST told need to be done for tomorrow (my coach is forgetful. I just can't quite find something that works, and I would really appreciate it if you guys could give me some help (and please, nothing about "master debating", these need to be approved by the administration). Thank you in advance to anyone that has any suggestions (I'm at my wits end!).