Exactly. I used KA to review some differential calculus and was surprised to see how effective the basic chalk-to-the-blackboard (digital pen, in this case) app

Exactly. I used KA to review some differential calculus and was surprised to see how effective the basic chalk-to-the-blackboard (digital pen, in this case) approach still was. It is also the reason why I prefer MIT's OCW video lectures over their edX ones. I like how most of the lecturers often take the time to write down the terms and ideas on the blackboard in the old-school way. I find learning that way helps drive home the concept in a more concrete way than flipping slides with voice-over. I believe this is especially important in case of subjects like math where 'doing' is perhaps the only effective way I am aware of learning the material. But then again, it may just be me.