The classroom would use the botanic garden's Fern garden which is currently little-used. Half of the total £22,000 cost is already secured but the Friends are asking for donations to help them reach their target in time for the botanic gardens' bicentenary celebrations in May 2017.
Brian Atkinson, chair of the Friends group, said education is one of the most important activities of Botanic Gardens, and this is especially so at Glasgow. Around 5,000 pupils visit the gardens each year.
As well as providing a purpose built presentation area when not being used for educational purposes the space will be available as a performance area. A circular pathway will be built that is suitable for disability access, seating for around 50 people using reclaimed stone, and replanting with fern and woodland collections.
Ian Goodman, project manager said: "This is a fantastic project combining education and the great outdoors. This is the type of MyParkScotland is here to support. Helping park improvement projects developed by Friends of Parks and other local groups raise funds through donations from the general public."
MyParkScotland is a crowdfunding platform originally set up as part of the Rethinking Parks programme, supported by Nesta, HLF and the Big Lottery Fund.