The Open University do a large number of Free Courses through their Open Learn platform. They have a very good course : ‘Exploring Sport Coaching and Psychology’. Like ICoachKids it is an interactive course with videos, audio clips and quizzes. There are interviews with world renowned experts, sportspeople and coaches. Really interesting content .
It has a guideline of 24 hours to complete and is broken into 8 sections. It is geared towards coaching children , teenagers and adults. A Statement of Participation is issued on completion. Get started here; however, be aware the portal seems to be slow at the moment when logging on for understandable reasons.