KITCHENER -- It's official: members of the Ontario Secondary School Teachers' Federation will go on strike on Wednesday.

The Waterloo Region District School Board confirmed Tuesday afternoon in a tweet that all of its elementary and secondary schools will be closed as the OSSTF strike goes ahead.

Schools will be closed because of the union's withdrawal of services and will reopen for students on Thursday.

It's the third in a series of one-day strikes sweeping the province. The first was province-wide; the second one didn't affect Waterloo Region.

The Waterloo Catholic District School Board will keep its schools' doors open through the job action.

Kitchener, Waterloo and Cambridge have all announced programming or day camps for students who won't be able to go to school on Thursday.

A Kitchener private school has also opened its doors to families and friends of its enrolled students. Scholars' Hall will be allowing them to come to school for the day free of charge.

The latest one-day strike comes as the province and the teachers' union grapple over a deal.

At the heart of their disagreement stand mandatory e-learning courses, an increase to average class sizes and compensation.

This is a developing story. More to come…