Khan Academy
4.3 out of 5 stars (based on 3 reviews)
Khan Academy is an American non-profit educational organization created in 2008 by Salman Khan,
Ознака: образование
TROM
4.8 out of 5 stars (based on 4 reviews)
TROM is a project that aims to showcase in detail the root cause of most of today’s problems
Википедија
5.0 out of 5 stars (based on 2 reviews)
Wikipedia is a multilingual online encyclopedia created and maintained as an open collaboration