NSW Premier Gladys Berejiklian said the single case was from a traveller from the UK, who has acquired the case overseas.

There were more than 5200 tests conducted in the 24 hours period, and the Premier continued to push people to come forward for more tests "to give confidence that there's no community transmission".

"We need that level of confidence as we ease restrictions," she said.

"As the months and weeks get colder, people are more likely to develop flu-like symptoms. Don't assume it is the flu, assume it is the coronavirus. Come forward and get tested."

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The biggest easing - ahead of further restrictions being lifted on Friday - is the return of formal face-to-face teaching, where most children will attend school at least one day a week for the next fortnight.

"Today our schools go back to face to face teaching, I know this is a huge relief for families," Ms Berejiklian said.

"If the next two weeks go well, we expect to have full time face-to-face teaching in NSW by the end of May."

She acknowledged there would be differences within each school but said, in most cases in public schools, Year 12 students were already back at school between 3 and 4 days this week.

Education Minister Sarah Mitchell said more than 550,000 "hygiene supplies" were being rolled out to schools this term, including 20,000 bars of soap and 40,000 bottles of hand sanitiser.

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Cleaning services have also been increased in government schools, she said.

"Parents should have that reassurance that our schools are safe places and we have prepared well for our children tor return to the classroom," Ms Mitchell said.

"It is the best thing for their child's education to go back into the classroom."

Ms Berejiklian said Friday would be a significant day for NSW and said she would be providing further detail over the next few days about the changes to restrictions announced over the weekend.

She said there was not any change recommended for workplaces at this stage, with people encouraged to continue working from home where possible to take the pressure off the public transport system.

"We will be recommending staggered work hours and a whole lot of other initiatives," she said.

She also said she was worried people were becoming complacent when visiting shopping centres and public places.

"Please do not be complacent. Even when you're out in a gathering of 10, make sure you keep social distancing," she said.

"Please assume you have the virus every time you leave the house. We cannot let our guard down, the second we let our guard down the cases will go up again."

She said shopping malls and escalators were a health hazard.

"If I were you, I wouldn't touch anything you don't have to touch. Keep physical contact to zero, or at an absolute minimum, because that's how the disease spreads."