Class draws 4,207 participants and carries out reenactment of experiment performed in space by late Israeli astronaut Ilan Ramon.Guinness World Records says it has recognized Israel's Science and Technology Ministry for holding the "largest chemistry lesson."
Guinness spokeswoman Anne-Lise Rouse confirmed the feat Thursday.
On Sept. 22, the ministry organized a class in 13 locations that drew 4,207 participants.
They carried out a reenactment of an experiment performed in space by the late Israeli astronaut Ilan Ramon, who died in the 2003 Columbia space shuttle disaster.
The record for a single venue - a separate category - was set earlier this year in Belgium, with 562 participants.
Ministry director Menachem Greenblum says the Guinness acknowledgment "brings additional world honor to Israel as a scientific powerhouse."
Israeli scientist Dan Shechtman won this year's Nobel Prize in chemistry.