K-12 Online Payment Processor - Your School Payment Solutiongeneral ledger icongeneral ledger icon, Keep track of every penny. RevTrak processes online school payments. Designed for K12 schools, we are the easy way to pay school fees online or on mobile. You can collect credit card, debit card, and eCheck payments for your K12 district 24/7 without lifting a finger. Get started in 3 steps!.