Teacher Tuesday

Quick post for the day! A year from now, I'll be teaching my first middle school (or possibly high school) science class. Whoo hoo!! In order to hopefully dodge the financial bomb of stocking my classroom all at once, I'm attempting to buy things a bit at a time from now until next August, when school starts. If any of you have any suggestions for "must-have" items for a beginner teacher, I more than welcome your input! As of now, I'm stocking up on borders and posters. I also want to get some lab supplies, but I want to be sure it'll actually be used and not something the school may supply for me. Thanks!!