Learning & Teaching for Mastery

Let's teach for mastery -- not test scores | Sal Khan - YouTube



"... it in a traditional academic model we group students together usually by age ... and we shepherd them all together at the same pace
...the teacher will give a lecture ... then we'll go home do some homework the next morning we'll review the homework then we'll get another lecture homework lecture homework that'll continue for about two or three weeks and then we get a test and on that test maybe I get a 75% maybe you get a 90% maybe you get a 95% and even though that test has identified gaps in our knowledge I didn't know 25 percent of the material even the a student what was the 5% they didn't know even though we've identified those gaps the whole class will then move on to the next subject probably a more advanced subject that's going to build on those gaps 
... 
that process continues and and you immediately start to realize how strange this is I didn't know 25% of the more foundational thing and now I'm being pushed to the more advanced thing and this one can view for months and will continue for years all the way it's at some point ... I hit a wall 
...
to appreciate how absurd that is imagine if we did other things in our life that way say home building 

so we bring in the contractor say told we have two weeks to build a foundation do what you can so they they do what they can maybe it rains maybe some of the supplies don't show up and the two weeks later the inspector comes looks around says okay the concrete's still wet right over there that part's not quite up to code I'll give it an 80% say great that's a C let's build the first floor same thing yeah we have two weeks do it you can inspector shows up in two weeks it's a 75% great that's a d-plus second floor third floor and all of a sudden while you're building the third floor that whole structure collapses ..."

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