If you are a student, teacher, or postbaccalaureate interested in applying to summer research and educational opportunities, check out the NSF ETAP portal. Start by filling out an application and then search for opportunities based on your interests. But act fast! Most deadlines to apply are late April/early May. The opportunities for teachers span K-14: elementary, middle, high school, as well as community college faculty.
If you are a Principal Investigator, you can use the portal to advertise your opportunities to a broad audience and streamline your application process.