http://www.cbse.nic.in/

Central Board of Secondary Education

http://www.ncert.nic.in/

National Council for Educational Research & Training

http://www.education.nic.in/

Department of Education, Govt. of India

http://www.classteacher.com/

Educational site for teachers

http://www.ncte-in.org/

National Council for Teacher Educational

http://www.hbcse.tifr.res.in/

Homi Bhaba center for Science Education

http://www.iitb.ac.in/

Indian Institute of Technology , Bombay

http://www.ignou.ac.in/

Indira Gandhi National Open University

http://www.ugc.ac.in/

University Grants Commission

http://www.dst.gov.in/

Department of Science & Technology, Govt. of India

http://www.iisc.ernet.in/

Indian Institute of Science, Bangalore

http://www.nda.nic.in/

National Defence Academy

http://www.howstuffworks.com/  

to know how a thing/ a machine/a body ...part works

http://www.answers.com

to ask questions and to know the answers in any subject

http://www.fearofphysics.com/

explanation of with animations & graphics

http://www.vias.org/about.html

Virtual institute of applied science

http://www.shakshat.ac.in

Shakshat portal

http://www.shiksha.com

Shiksha portal