Sources:

NCERT – Class 6 – History text book (Our Pasts – 1) – Chapter 4 : In The Earliest Cities

Read chapter online: Click here (Web – PDF format)

Download chapter : Click here (Zip Format)

Mind Map: In The Earliest Cities (1438 downloads) or Read online Below:

http://www.ambitionias.com/wp-content/uploads/2015/08/In-The-Earliest-Cities.pdf

NCERT – Class 12 – History text book (Themes in Indian History – Part 1) – Chapter 1 : Bricks, Beads and Bones – The Harappan Civilization

Read chapter online: Click here (Web PDF format)

Download chapter : Click here (Zip format)

Mind Map: Bricks, Beads and Bones - The Harappan Civilization (744 downloads)  or Read online Below:

http://www.ambitionias.com/wp-content/uploads/2015/08/Bricks-Beads-and-Bones-The-Harappan-Civilzation.pdf

Links and Videos given below

The above sources are good enough. You can follow these links for better understanding:

Links

• https://en.wikipedia.org/wiki/Indus_Valley_Civilization
• https://simple.wikipedia.org/wiki/Indus_Valley_civilization
• https://www.sscnet.ucla.edu/southasia/History/Ancient/Indus2.html
• http://www.harappa.com/har/har0.html
• http://www.ancient.eu/Indus_Valley_Civilization/

Videos

Harappan Civilization – Indus Valley Civilization

Harappa

Life in Harappan Cities