The first thing you need to think about is your team of tough little salespeople. The kids are the most important thing to considerer when deciding what kind of middle school fundraising ideas will be best for your group. Often the students themselves want to sell candy, maybe chocolate bars or M&Ms, but some may want to do something different like pizza cards or scratch cards. Don't expect that everyone will automatically agree on the best middle school fundraiser ideas, but you probably know the students well enough that you can take an educated guess as to what sorts of fundraiser ideas would be popular with them.
Second, of course you want to think about your customer base, the people who are so important for a successful fundraiser. Will your middle school students be selling to the other students for the most part, or will families and the larger community be targeted as well? Knowing your customer base can make a huge difference when you are choosing middle school fundraiser ideas for your group. Chocolate, for instance, may go over well with the students, but if your customers are mostly odults in the community, you might want to try a more appropriate fundraiser for adults instead, like the green fundraiser for example.
If you have a small group, you may do really well with a fundraiser idea like scratch cards, which have a high profit margin, but larger groups can also try fundraiser ideas with higher minimum orders. Have a look through our middle school fundraiser ideas to get some inspiration - you're certain to find a fundraiser idea there that will be perfect for your middle school.