differential equations incomplete

hello,

I've noticed that algebra and calculus courses are full of videos and exercises, Multivariable calculus doesn't have almost any exercises, and so it is for linear algebra. 

I'm studying differential equations now and i feel that the course is incomplete, lacks important parts, examples and exercises. I am studying on http://tutorial.math.lamar.edu/Classes/DE/DE.aspx where you can see a list of the topics, and where i can I integrate the learning with kahn academy, but it comes short.

I have to find other resources online but none of them is as good as kahn academy has proven to be in other topics. 

Is it reasonable to expect new content on differential equations and partial differential equations or are we seeing a stagnation in this respect?

thank you very much