Canowindra government schools - Primary and High School both started classes yesterday, although teachers were back on deck from Monday morning.

Schools are not just encouraging students to start switching on to school, but also parents.

The NSW Department of Education and training said it welcomes parents involvement and support.

"Parent Groups like the P and C Association provide a great opportunity to become involved in the life of the school and to participate in the wider school community," said Canowindra Primary Principal, Eric Toole.

"Canowindra Primary has various parent bodies."

Volunteering at school events and fundraisers can be a great way to meet other parents and school staff and any help parents are able to offer will be appreciated.

Parent involvement is also key for any nerves about starting a new class, or making the leap from primary to high school.

As students return to school, the NSW government will begin implementing the final part of its $710 million program to reduce class sizes.

Under the plan, the average class size will be 20 students in kindergarten, 22 in Year 1 and 24 in Year 2.

Parents and students with questions about preparing for the return to school can call a state government sponsored hotline on 1300 738 338.

Hotline staff will be able to help with questions on a range of topics: from starting pre-school, moving from primary to high school, uniforms, homework, term dates and fees.

The hotline will take calls between 8.30am and 5pm (AEDT), Monday to Friday, until February 8.