I'm using these to freshen myself for occupational therapy school, and I find them easy to understand and also challenging! One thing--don't forget that occupational therapists can treat these issues, too, not just physical therapists. ESPECIALLY when it comes to ADLs, which were mentioned in the knee injuries lecture. And they also tend to to specialize in the upper extremity, so it surprised me that OTs weren't mentioned in the shoulder lecture. Otherwise, great lectures and very engaging and helpful!