Students at St Crispin's School, Wokingham, are researching, planning and fundraising for a month-long school trip to Peru.
Sixteen pupils from Years 11 and 12 will take part in next July's visit. Preparations for the expedition, which is being supervised by history teacher Neil Davis, began in January.
Each student must raise #163;3,500 and has a series of instalment payment dates to meet. Fundraising schemes include car washes, cake sales and savings from Saturday jobs.
A sponsored leg-wax is scheduled for February and some staff may undertake the Three Peaks Challenge in April to help raise cash. The trip is being organised with Wilderness Expertise, which is based at Wellington College, Berkshire.
Mr Davis said: "I pick the country, and apart from that and the budget (it's down to) the students find out about the different areas and the sites they want to see.
"One of the reasons we do these trips are because they aren't just holidays; it is about the whole experience. I think they can get a lot out of the 18 months building up to it."
The expedition will spend five days on a community project before travelling to the north of the country looking at historical sites, trekking in the rainforest and visiting Iquitos, the largest city in the world that cannot be reached by road - its 370,000 inhabitants need to take a boat or plane to leave the area. hw.