I see a lot of courses on Software fundamentals but not much on how to rigorously testing a software or application. After you "complete" (honestly no software is ever complete) an application but most important thing is testing. After working in the space as an SE, I've found great value in testing and I believe it should be an essential step to know different testing frameworks, methodologies and concepts.

I implore the Khan Academy team to create courses on Testing Fundamentals and Advanced Testing frameworks.

Thank you