Beverly and Gloucester teachers’ unions were ordered to pay $50,000 fine Wednesday as contentious negotiations continue and their strike heads into its fourth school day Thursday. An Essex Superior Court judge ruled Wednesday that the union must pay $50,

Classes were canceled again on Wednesday for nearly 10,000 students as the teachers’ strike continues across three North Shore communities. Educators across Beverly, Gloucester and Marblehead are refusing to return to the job until a new contract is reached with their local school committees.

Teachers in two Massachusetts school districts have gone on strike over pay, paid parental leave and other issues.