My edX professor of differential equations just passed away. His lecture and his online course should be there for his life work. Technology makes it possible.
You may wonder how he regarded IT technology, as the computer can calculate what has been only possible for a handful of experts. In any case, my co-learners and I have learned a lot from the course. Let us use the knowledge on solving math and science problems.
It should be emphasized that the other courses even in math without ode -- and there're some even in MIT courses -- would be limited by primitive derivation of some specific cases. Math is a seriously important basis of every science.
ODE Nodal Sink is my work (I wrote it as I took his course).
See the Pen ODE Nodal Sink by easai (@easai) on CodePen.