An additional strike by teaching assistants, contract faculty, and graduate assistants took place throughout March 2015. When the strike began, on March 2, the university cancelled nearly all classes because about 2/3 of York courses were taught by the striking contract faculty at the time. On March 10, the contract faculty ratified a new agreement, but the teaching assistants and graduate assistants rejected tentative agreements the bargaining team had reached with the university. The teaching assistants and graduate assistants, continued their strike until the end of the month. Contract faculty did not go back to work in support of the union and classes remained cancelled. The union reached a tentative agreement with the university on March 29, 2015 which was ratified on March 31, 2015, thus putting an immediate end to the 29-day strike.