The council provided a grant worth $2600 plus GST, and the teaching time and administration was donated to make up the difference.
Robinson said whanau, work and learning a new language were some of the reasons students joined the classes.
Rich Soper was one of those who was on the course. Soper is a Whangārei police officer and said he went on the course after the police put the opportunity out to staff.
Soper recalled how difficult it was to communicate with a victim he had dealt with in his job, who had a hearing impairment, even with a piece of paper.
He said learning sign language "took a bit of practise" but he knows the sign language alphabet as well as basic words and phrases and has been passing it on to his children.
"It was really cool, I thoroughly enjoyed it."
The students will be awarded certificates for completing the course on Saturday at St Stephens Church Hall.