RSM is an after school program that offers children in grades K-12 the opportunity to receive top-quality instruction in mathematics. It began with the partnership of a passionate parent and gifted teacher, and has since blossomed into a strong movement. For over two decades, the program has been held in Ms. Rifkin's kitchen table outside of Boston, Massachusetts. It is now run as a family business, and only opens a new location when a gifted and experienced teacher is available. Currently, RSM serves more than 50,000 students across North America, and has caught the attention of various media outlets such as the Boston Globe, TED, NPR, and the Atlantic.