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Fifty-two fewer winter sports teams are running in Ottawa's public high schools this year after some teachers chose not to volunteer to run extracurricular activities in a protest against the Ontario government.

The Ottawa-Carleton District School Board said 93 teams will be operating in its 25 secondary schools this season, compared to 145 last year. The numbers could change as volunteer arrangements at schools become clearer.

The loss is a result of job action by Ontario teachers.

Unions have encouraged teachers not to volunteer to run extracurricular activities, which includes coaching sports teams.

Teachers' unions are protesting the Liberal government's passing of a two-year freeze on wages and new rules that limit the effectiveness of strikes.