How do I lose weight on short notice?

I'm starting 7th grade in a bit over a month! -.-" Anyway, I wanna know if I can lose 5-15 pounds through that amount of time. I want to really focus on the tummy and I want to tone my thighs. I can't really cut out on anything because we don't have that type of money where we just stop eating something and go buy another. And I want to boost my metabolism too. They say eat about every 3 hours. I can't do that! I have school. It's frustrating because I'm on vacation and I don't want to exercise alone. (7th grade tips or experiences will be appreciated) An at home workout plan would be helpful for my teen girl self! Thanks people! muchlove