The application deadline for the prestigious PROMYS program at Boston University is April 1st. PROMYS, or Program in Mathematics for Young Scientists, runs from July 2nd to August 12th. The program generally costs $4,200, but tuition is reduced to $2,718 for students from families with an annual income below $60,000, and you can apply for financial aid beyond this if needed. You have to be 15 by the day the program starts to be eligible.
PROMYS has a lot to offer. It’s a great way to 
learn Number Theory. For six weeks you have the experience of living in a dormitory at Boston University. It’s a large program (about 80 students), and immersive. There are more than 20 counselors there to support students, in addition to faculty, research mentors and other visiting mathematicians. If you want to experience what it’s like to be a mathematician yourself, the PROMYS experience offers an unparalleled opportunity!