Harvey Mudd College, one of the top-ranked STEM (science, technology, engineering, and mathematics) schools in the country, has a math and science homework hotline for grades 4-12. The tutors are all students at the college and are selected for their communication and technical abilities; they also receive additional training.
Homework Hotline can be reached at 1.877.827.546, M-TH from 6 to 9 p.m.