Amsterdam trip

Okay.. so my school is hosting a trip for all the 10th graders to Amsterdam, problem is THEY expect us to pay EVERYTHING. for three days. Which means its 340€ i could easily go there for cheaper!! They say its to bring the students "closer" but we're literally moderated the whole trip and have no access to technology, like they've got our whole trip classified, its like going with a stuck up friend. 

Should I go or nah?? The trip is in October..