Two years ago the school became involved in the signing programme, and it had now "become second nature to what we do", Mr Bloor said.
Currently, there are two students at the school who require deaf communicators and another four with hearing issues.
Dontaey Hall has a cochlear implant, otherwise known as a bionic ear, or in Dontaey's case, "his hearing".
He had already embraced Seesaw and communicated with his mother via video using sign.
The app also gave communicators Averill Wilbraham and Kath Shepherd an opportunity to assess his signing.
Although it was introduced in the New Zealand curriculum in 2007, there was still no sign language assessment which, like the English language, has subtle differences which can change meanings.
Each week the National Anthem is communicated in the Maori language, English and sign language, and can also be recorded and sent out to parents through the app.
They came at a small cost to the school and it was free for all parents.
The principal said this "fourth platform" gave parents who rarely got the opportunity to come into school an insight into their child's day.
"Some parents work two or three jobs or shift work, so they never get here.
"This is one way they can still keep in touch."
Mr Bloor said the school community was diverse and the app had allowed them to "reach parents we have never been able to reach before".