Dear Guys! For you, I have made a selection of useful sites:

• Ctege

• More than a lesson!

• All-Russian Olympiad for schoolchildren

• Open biology

• Rent GIA

• The official portal of the GIA: OGE and USE

• FIPI

• Electronic textbook on biology

• PostScience

• Mega-encyclopedia of animals

• "Quantum" magazine for the curious

• Encyclopedia "Around the World"

• Interactive multimedia textbook "Organic Chemistry"

• Library of video lessons of the school curriculum

• Uchi.ru