Slippers were thrown at the stage during Bihar Chief Minister Nitish Kumar's rally in Madhepura today, allegedly by contract teachers demanding better pay and working terms. This is the latest violence in a series that also included stones, eggs and slippers flung at him in other public meetings during the chief minister's ongoing Adhikar yatra (Rights March). Most of the violence is being carried out teachers who the Nitish government has taken on contract. They are demanding their term be regularised and their pay be at par with permanent teachers.