Otangarei School and Totara Grove Primary were both participants in the programme's initial introduction to schools, with two classes a week.
Miles Ferris, principal of Otangarei School, said the kids and the teachers were buzzing with excitement over the programme.
He said the students loved it, and teachers were amazed at the good behaviour shown by children during the classes.
Sistema Whangarei is now taking registrations for an after-school programme that will be held at the old Maori Women's Welfare League offices on William Jones Drive in Otangarei.
The after-school programme will build upon skills such as rhythm, melody; the students will use "whisper instruments" to improve their confidence, before graduating to string instruments and orchestral musicianship.
Any violins, cellos, violas, or double basses that are no longer being used can be donated to be played by the next generation of musicians at Sistema Whangarei, 9 Lupton Ave.