A special "strike force" of NSW teachers has been formed to help boost marks in schools across the state which are underperforming.

Key points: Fifty "outstanding" teachers will provide on-site support at an unknown number of schools

Fifty "outstanding" teachers will provide on-site support at an unknown number of schools The NSW Government would not identify the underperforming schools

The NSW Government would not identify the underperforming schools The program will focus on teachers delivering HSC courses

It will be known as the "Best in Class" teaching unit and will be made up of 50 hand-picked teachers.

They will share their knowledge with teachers from schools with poor results by holding workshops as well as providing on-site support.

"We've identified 50 outstanding teachers who've demonstrated through results how they've been able to demonstrate outstanding teaching methods," Premier Gladys Berejiklian said.

"We want them to use their expertise to support other teachers because we are all about raising standards."

The teachers will still work in their existing schools, but reduce their face-to-face teaching time so it's split 50-50 between their role as a classroom teacher and the strike force.

Australia's most famous maths teacher Eddie Woo is part of the team.

"A normal high school teacher has five classes ... so taking two or three of them full time enables you as a teacher to be there for those students," Mr Woo said.

"But also still having the time to provide support to teachers and mentor them."

The program will begin this week and focus on teachers delivering HSC courses, but there are plans to, eventually, expand it to other high school classes.

The Government would not identify which schools the strike force would target.