SUDBURY -- As a possible strike looms on Monday by education support workers, parents in some school boards are being urged to make childcare plans in case classes are interrupted. 

The strike involves custodians, clerical workers, and early childhood workers, and in some boards, schools are planning to shut the doors.

Here in the north, the union representing Sudbury's Rainbow District School Board teachers says they will be in class on Monday.

At most northern public school boards, the Canadian Union of Public Employees (CUPE) represents only custodians, while clerical staff and early childhood educators are in other unions.

Some school boards, such as the Sudbury Catholic District School Board, have cancelled the community use of schools for the time being.

CTV News has confirmed that the schools in the following school boards WILL REMAIN OPEN in the event of a strike:

Sault Ste. Marie -

Algoma District School Board

Sudbury - 

Rainbow District School Board

Sudbury Catholic District School Board

Conseil scolaire catholique Nouvelon

Conseil scolaire public du Grand Nord de l'Ontario

Timmins -

District School Board Ontario North East

However, the Sudbury French Catholic school board says extra-curricular activities will be suspended in the event of a strike.

CTV News has learned that the following school boards WILL CLOSE SCHOOLS Monday if a strike moves ahead:

North Bay - 

Near North District School Board

Sault Ste. Marie - 

Huron-Superior Catholic District School Board 

Timmins - 

Northeastern Catholic District School Board

In order to avoid a strike, the two sides will meet for three straight days, beginning this afternoon and ending Sunday night.  CUPE says that if a settlement is not reached by the end of day on October 6, strike action will begin October 7. 

CTV News will continue to follow this story and bring you the updates.