You can watch The Ron Clark Story on Amazon Prime Video, including Amazon Prime Video with Ads and the Shout! Factory Amazon Channel. It's also available for free with ads on streaming platforms such as Tubi TV, The Roku Channel, and Plex. Additionally, you can rent or download the movie on Amazon Video. There is an official YouTube posting of the full movie with proper licensing as well. However, availability might vary by region, so it is good to check these platforms directly.