A graduate school is a school that awards advanced academic degrees with the general requirement that students must have earned a previous undergraduate. The term grad school means a higher education institution which awards postgraduate degrees – most commonly master's and doctorate (PhD). Accredited Grad Schools: Master's to Ph. Graduate school constitutes an advanced program of study focused on a particular academic discipline or profession. View our grad school rankings & resources to find the best grad school for you. Looking to go to grad school? Compare graduate schools online.