Dozens of people protested outside Motherwell Civic Centre against plans to merge Our Lady’s and Taylor Highs.
The date of the protest was chosen as it coincided with a meeting of North Lanarkshire Council’s Learning and Leisure Services committee.
While the matter was not on the agenda, demonstrators felt it was the perfect time to send a message to councillors.
Organiser Tina Provan said: “I’m just a normal parent, I have a daughter at Taylor and a son at Christ the King Primary, and from my perspective this just can’t happen as they are planning to take the heart out of the two communities and build a new school at Ravenscraig because the regeneration isn’t happening as quickly as they would like.
“Would the council build a contaminated site beside a school, no they wouldn’t, so why are they building a school next to a contaminated site?
“I am not willing to take any risk with my children’s health and will send them to a non-denominational school if it comes to it.
“This is proposed to be the largest secondary school in North Lanarkshire, but with 10 per cent less staff so how does this give any of the children the best education?”
The protestors were supported by several SNP politicians.
Central Scotland list MSP Richard Lyle said: “As a New Stevenston resident and an MSP I’m very concerned by the council’s plan and believe most parents want the schools upgraded not relocated.”
Learning and Leisure Services executive director Andrew Sutherland added: “Of course, we understand there may be a number of views and are keen to hear these, but I’d stress we are working for the betterment of our young people.”