The teen was evacuated to the HaEmek Medical Center in Afula in critical condition and without a pulse. He was pronounced dead at the hospital.
- Bar Mitzvah boy severely injured in ATV crash
"Students went into the water and at some point noticed that one of their friends was missing," said Magen David Adom Spokesman Zachy Heller, adding that some 15 minutes later the children found their friend at the bottom of the pool.
"Paramedics wer resuscitating and medicating him, and his death was pronounced at the ER," Heller added.
Earlier Thursday, three siblings, 16, 19 and 26, were reported missing after going in the water at an Ashkelon beach.
As many were on vacation, marking Passover Chol HaMoed, Israel's sites were crowded, and some were even closed due to full capacity.
According to the Nature and Parks Authority, during the Passover Chol HaMoed holiday more than 300,000 people visited Israel's sites and national parks.
During the day, rescue services were high in demand. Three rescue forces were called in to help some 136 hikers stranded in the Judean Desert. All hikers were eventually rescued.
In the Arava they assisted in the evacuation of 35-year-old woman who fell six meters into a stream and broke her leg.
In the north, they were called to assist in the search of an 8-year-old boy who had gotten lost during a trip with his family – the boy was found five hours later. In another incident they were called to help a car that had flipped over.
Wednesday saw the deadliest day in Israeli roads since May 2012, with seven people killed in car crashes.
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