A mechanical digger has begun tearing down the old St Peter Port School.
The Les Ozouets campus was built in the 1960s.
Specialist contractors have been removing asbestos, and now a mechanical digger is being used to break the building down.
The site should be levelled by mid-August, to allow a new Guernsey Institute to be constructed.
Institute Head Tracey McClean says the new campus will offer opportunity to many post 16 students:
"In three years time hopefully we will be moving into a brand-new building, so it will mean that we can increase our provision and opportunities on the island.
There's nothing like learning in the classroom and being with a group of peers and sharing ideas."
Beau Sejour remaining shut over weekend
Flyers advertising polar opposites delivered in Guernsey
Alex Scott named in England squad
Dangerous cycling on Guernsey roads
Closure ongoing at Guernsey's leisure centre
Guernsey's leisure centre closed for another day
Health authorities to consider 'cot cams' recommendation
Guernsey tax backlog 'worse than thought'
