Electronics is fundamental to modern life. Take for example this free course, Electronic applications. An interactive website with videos and interactive software will show how electronic systems pervade everything we do; review some basic ideas
of signal processing, control and communications; and allow you to use a digital filter to remove Gaussian noise from a signal.
Overall was a great course, I had to analyze and investigate some concepts apart, not in mathematics but specific electronic concepts but I learned a lot and I'm thankful to The Open University for this course and opportunity.