The first strike authorization by teachers came in October 1966, when teachers represented by the American Federation of Teachers voted to authorize a strike in order to secure collective bargaining rights. Teachers again authorized a strike in May 1967 over salary demands. This time, a strike did take place. 85 teachers crossed picket lines, and over 150 parents entered the school to teach. A court ordered an end to the strike the day after it started. Despite the court order, 200 teachers refused to return to school, with 100 calling in "sick". After two days of disruption, the strike was called off by local union officials.