I applied to one Masters program in Biology which is a course-based program. Now the application is under review and will get the results at the end of next month. However, meanwhile , I am also looking for other schools/principal investigators to contact about my interest in their graduate programs.The reason is that I am not guaranteed an entrance to the initial school and I don't want to miss another year just because I only put all my eggs in one basket.
Is it bad to apply for multiple schools ( by multiple I mean 3 schools total)? and how do students normally get around with requesting the reference letters from their referees for more than one application? Not all referees like writing reference letters.