There are three kinds of teacher-decorators: those who were born for Pinterest, those who can’t, and all the ones in between (such as the broke, the tired, and the I-have-no-time-to-decorate). However, making a classroom appeal to middle and high school students doesn’t HAVE to involve serious crafting or expensive, time-intensive projects. Check out these tips from me and Bonnie from Presto Plans as you prepare your classroom for the fall (or at any time of year that you want to give it a…