"We've had a real belt of it go through the school. We knew if it hit the kids it would only be a matter of time before our teaching staff would be directly impacted.
"We know this is not ideal, however, under the circumstances it is our best option."
He told parents Covid-19 was still causing a lot of anxiety and everyone's situation was unique to them.
As of Monday, Thames-Coromandel had 345 active cases (39 new) and Hauraki had 424 active cases (47 new).
The total number of cases in this Waikato outbreak is now 33,410 (11,816 active and 21,594 recovered).
There were 209 vaccinations given in Waikato on Monday.
There were 74 Covid-19 positive individuals receiving care at Waikato DHB hospitals – a mix of patients receiving care for Covid-19 and those receiving care for an unrelated condition who have also tested positive.
At phase three, the focus is on safely managing Covid-19 at home to keep hospital beds free for people who are vulnerable and need medical treatment.
The DHB says a rapid increase in case numbers meant a greater need for people to self-manage their situation using online tools such as reporting themselves as cases and close contacts.
• Testing is available in Tairua at the community hall carpark. You should get a Covid-19 test only if you have symptoms, or you are a household contact.