Confusion matrix for humans is complex, because the confusion is caused by definitions, and there are multiple dimensions to a definition.
What is the Nature of Truth? Is Truth Absolute or is it Relative? Is Truth Universal or Local? Is Truth Universally Applicable Fact or is it a Local Social Perception?
A Sanskrit poem about Ramayana when read in reverse direction becomes a poem on Mahabharata!
For online education to succeed for smaller classses - it should be as interesting as cartoons. Online education cant succeed unless it is more interesting, interactive and innovative than offline schooling.
A complete list of all dhatus (root words or verb roots) in Sanskrit dictionary and their meanings with corresponding IPA transliteration.
The difference between Planets and Grahas. Why are Sun and Moon included in the list of Navagrahas? Isn't it true that Rahu and Ketu do not exist? What about Earth?
The most important contribution of ancient India to mathematics was not zero but the place value system or positional notation system.