Parents have been urged to mobilise to save their local school.
Pitlochry High is being considered for closure as part of a wide-ranging estates review.
Perth and Kinross Council has announced a series of drop-in sessions to give the public the chance to have their say on the proposals.
Education chiefs are considering five options for the school, including closing the secondary section and moving pupils to Breadalbane Academy.
Another suggestion is to move only S4 pupils to Breadalbane and review the Pitlochry building.
Locals are in favour of options to increase capacity by introducing S5 and S6 years, or to extend the catchment area.
Andy Charlton, who chairs the parent council, has issued a plea for residents to get involved in next month’s talks.
He said: “By listening to the voice of the community, it is evident that there is a deep desire to improve the current building by investing in it.
“Pitlochry High School is already an excellent place of learning but by adopting a positive attitude it could quite easily become a building which further enhances the lives of anyone living, working or visiting the area.
“It also has the potential to attract new families and employers into the area and perpetuate further growth.”
He urged locals to attended the forthcoming meetings and make their views known. “We can’t stress strongly enough how vital it is that everyone in our community rallies round and voices their opinion during these drop-in sessions.
“This review is a once-in-a-generation threat / opportunity involving our school and our community.”
Meanwhile, local SNP politicians have expressed their concerns about the consultation process.
John Swinney MSP said: “During important processes such as potential school closures, it is essential that rigorous consultation is undertaken.”
He said the council’s request for attendees to book in advance could deter people from coming along.
Councillor Mike Williamson said: “From the start, I have wanted these meetings to be as inclusive as possible.”
He raised concerns that, initially, there were no sessions planned outside of Pitlochry, in Blair Atholl.
“I want to make sure that everyone is able to take part,” he said.
Conservative councillor Callum Purves, vice convener of the lifelong learning committee, who is leading the second phase of the school estates review, said: “I want as many people as possible to engage in this consultation and I am keen to work with the local community on how best to achieve this.
“I have been listening to the concerns raised by the parent council, community councils and wider community and have been working with council officers to address them.”
He said no one would be turned away from the meetings if they don’t book a place in advance. “It is disingenuous and misleading to the public for senior politicians to suggest otherwise,” he said.
Mr Purves added that council officers had now organised informal drop-in sessions at Blair Atholl and Ballinluig.
A council spokeswoman said: “The informal consultation sessions we are organising cover the daytime, evening and weekend in the interests of enabling as many people as possible to attend.
“Our intention in asking people if possible to book a session of their choice is purely to ensure that we can manage the number of people at each session in order to be as helpful as possible, as we recognise time is precious and limited for everyone.”
She said the public can also comment using an online questionnaire, which will go live on the council website on Tuesday.
The first session will take place at Pitlochry town hall on Saturday November 3 from 9.30am to 1.30pm. There will be follow-up meetings at the high school on November 6 (from 3.30pm to 7.30pm), November 19 (10am to 1pm) and November 19 (3.30pm to 7.30pm).
