The ACE national website links to several summer programs, some of which are free or offer tuition assistance. Additionally, there are local colleges that offer programs here in Rhode Island.
Roger Williams University
RWU has a four week Pre-College Summer Academy in Architecture for rising juniors and seniors. Information about this program can be found here.
Rhode Island School of Design
RISD Pre-College is a six week program for rising juniors and seniors. Information about the program can be found here, and they offer a special preview event on Saturday, March 3rd. Please note there are very specific application requirements for this program, and scholarships are available.