Potomac Tutors was established in 1993 and has been offering one-on-one help for 2nd graders through 12th graders ever since. Throughout the summer, it is open 9 a.m. through 5 p.m., and by appointments only during the weekends. Throughout the school year, it is open from 11 a.m. through 10 p.m., and it offers a free lot.