MIT (and Wellesley) undergrad students can work for credit, pay or as volunteers.
You can learn more about policies and deadlines on the UROP website. The Media Lab is one of the largest employers of UROPs at MIT, with approximately 150 students working each semester.
Summer 2017 Deadline for UROP proposals:
Thursday, April 13 at 5pm-Direct Funding
Thursday, June 29 at 5pm-Sponsored Funding, Credit and Volunteer (To receive credit for summer UROPs, undergraduates must register for the summer session and pay applicable tuition. Please see the MIT Summer Session Catalog for details.)