Nearly all primary schools in New Zealand now required pupils and parents to sign codes of conduct for internet use during class.
It also gave instructions on what to do if harmful or inappropriate material appeared on screens.
Online safety programmes, covering topics such as not revealing personal information or posting photos to strangers were also backed by repeated verbal reminders from teaching staff.
"At the start of the year, and touching on it every term, teachers do the whole thing around cyber safety and accessing appropriate sites," Bush said. As well as online lessons, the dangers of the internet were emphasised at assemblies.
The children were told to be suspicious of people they did not know when they were online and only connect with people they knew in real life. They were also advised about the ramifications of making posts.
"They know that whatever they put out on the internet is the same as getting a tattoo - you can't easily remove it."
Bush said schools connected to the Government's Network for Learning had a firewall that generally protected children at school from sites they shouldn't visit.
He said social media use did not become an issue in schools until the pupils approached intermediate age - about 11 - although they were not legally meant to be using many popular sites. Facebook rules state users must be at least 13 and Twitter will terminate any accounts it discovers are operated by those under 13.
It was hoped the messages drilled into the children in their earlier years would form good online habits during their teenage and adult years. Bush said it was also imperative that parents monitored their childrens' social media and internet use.