The Critical Thinker Academy offers a variety of video courses for a small one-time fee: $9 per course. You can also purchase access to all the courses on the site for a single one-time fee, $99, which offers a 25% savings on the cost of purchasing all the courses separately.
I run another site, the Argument Ninja Dojo, where I offer access to all these same courses as a monthly subscription, for $3.95/month.
The Argument Ninja Dojo is intended as a membership/community site and it has subscription tiers that offer more than the video library. It includes content from my Argument Ninja podcast, and other sources.
If you're interested in really developing your critical thinking and communication skills, please consider this option!
There are introductory videos that will orient you.
If you are already a member of the Critical Thinker Academy, you can take advantage of a great deal on signing up at the Argument Ninja Dojo: