Lpr90

Hey everyone! So by now, most people have heard back from the majority of the schools applied to. I applied to 6 grad programs, and have heard back from 4. I got wait listed to one, and denied from the other three schools. My top choice school, I was denied admission to. Talk about a heart break. In this sort of a scenario, is it wrong to follow up via email and ask why I was not offered admission into their SLP program? I'm not sure what the proper etiquette is and I do not want to give a bad impression to admission committees. I'm planning on re-applying next year and want to know what I can improve on.... Advice/ comments are welcome! Thanks