An online petition has called for a vote of no confidence in the headteacher and governors of Prince William School in Oundle.
The petition was started by mum Claire Anstee more than a week ago, and she has already picked up more than 350 signatures.
Claire said: “Our children have suffered multiple changes of teacher and no continuity of teaching staff.
“This has had a profound impact on the grades of many students, my son included.”
Prince William School will be switching from the current two-tier education system used in Oundle and Thrapston to a three-tier system, used in the rest of the county.
The changes were approved last year and are expected to cost about £22m to implement.
For more information about the petition, visit tinyurl.com/oundlepetition.