I am applying to several schools with differing time periods of offers of acceptance/interviews. For example, Mayo has rolling admissions so they could offer interviews any time, University of Minnesota is also somewhat of a rolling admissions so offers of admission are typically process 4-6 weeks after application submission, University of Wisconsin - La Crosse offers of admission are in mid January, and University of Washington is in mid February. So my question is, if (fingers crossed!) I get offered admissions to these schools how long do I have to accept before the offer is rescinded? I don't want to accept an offer at a 2nd or 3rd choice school just because I won't hear back from my top schools for another month, but I also don't want to decline the offer or have it "expire" on me and then not get into my top choice schools and have no options. Basically I'm asking, for those who have been accepted or have first hand knowledge of this, how long of a time period do you have to notify the school of your acceptance before you lose your spot?