LONDON, ONT -- This week brings a new round of teacher strikes in the elementary, secondary and French school systems.

The Elementary Teachers' Federation of Ontario is planning a provincewide strike Tuesday, and all boards will hold a one-day strike on another day this week.

For the Thames Valley, Avon Maitland and Lambton Kent school boards that second day is underway, meaning students are off Monday and Tuesday this week.

The union representing French teachers has announced it will be starting weekly, provincewide strikes starting Thursday.

The Ontario Secondary School Teachers' Federation is holding a strike on Thursday at the Avon Maitland, Huron-Superior Catholic and Greater Essex County school boards, among others.

The strikes come as teachers try to put pressure on the province during contract negotiations.

Ontario's French school teachers are planning a province-wide strike on Thursday and Catholic school teachers will ramp up their administrative job action starting Tuesday.

- With files from CTV London