Full-time and occasional high school teachers with the Rainbow District School Board in Northern Ontario will hit the picket line Monday.

The teachers are set to strike after union officials said negotiations at the bargaining table failed.

This strike will affect about 5,000 high school students from 11 different schools in the district, according to a spokesperson with the OSSTF.

“Our teachers would prefer to be in class with their students than on the picket lines,” James Clyke, District 3 President said in a statement released Saturday afternoon.

“The employer’s unwillingness to negotiate in any meaningful way has really left us no option,” Clyke adds.

Public high school teachers in Durham Region have been on strike since April 20, after the union and school board could not reach an agreement. Over 21,000 students are affected by the ongoing job action.

On Friday, the Elementary Teachers' Federation of Ontario received a "no board" report from the province's minister of labour, which will put elementary-level teachers across the province in a legal strike position in 17 days.

The union's 76,000 members have been without a collective agreement since the end of August last year. In November, members gave the union a 95 per cent strike mandate.

Talks between the government and the union are set to resume next week.

Meanwhile, members of the Ontario English Catholic Teachers Association also gave their union a 94 per cent strike mandate on Friday.

The president of the Catholic teachers' union told CTV Toronto's Naomi Parness that a strike could take place as early as June. But there's also a good chance that work-to-rule action or a strike could be on the table when students return to school in September.

"Our members' working conditions are also student learning conditions (and) the proposal on the employer’s side would cause real damage to education in this province," said James Ryan, president of the Ontario English Catholic Teachers Association.

Education Minister Liz Sandals issued a statement Friday, saying the government will continue to work on reaching agreements with the union.