Those who scaled the peak were Guribadat Singh, Prithvi Singh, Ajay Sohal, Shubham, Fateh Singh and Raghav Juneja. They were in the age group of 15 to 17, officials said.
Youngest climber Raghav reached the summit around 7 am. Two hours later, Fateh scaled the summit successfully.
Guribadat followed around 12.30 pm. However, Hakikat Singh had to be held back after climbing 27,600 feet, as there was some problem with his oxygen cylinder.
School officials said before scaling the Everest, the boys underwent basic and advanced courses at the Himalayan Mountaineering Institute in Darjeeling.
During the training, besides climbing two major peaks in the Kanchenjunga area, the students were given high-altitude training in the Ladakh region of J&K.
They also undertook a cycling expedition in the Thar desert, where they pedalled more than 1,000 km in nine days.
The expedition was flagged off on April 5 from India. -agencies