"At the end they were presented with a certificate as they had been part of the river educational experience."
On Wednesday, students from Westmere School, Mosston School, Fordell School and St George's School will also experienced the cruise.
Ms Petherick said that the educational cruises started at the end of last season, but its continuation would depend on funding as "we can't afford to just give away cruises".
This time around, a grant was given by the Macarthy Trust so there was no cost to the students.
"The Waimarie has been traveling up and down the river since 1891," Ms Petherick said. "It's the biggest tourist attraction that Whanganui has, so they all need to know about it."
Durie Hill School principal Geoff Simes said it was a "really neat initiative".
"They'll learn about the history of the Waimarie and history of the river. Anything to do with local history is important for kids."