The students were on a beach and some of the party went into the sea for a swim, but they got into trouble.
Their friends tried to form a human chain to help them get back to the shore, but it didn't work.
Airlifted
There were 16 teenagers in the party and eight of them were airlifted to hospital by helicopter.
It's thought one of the pupils is quite seriously injured.
They've been taken to a hospital nearby.
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