Thank you for your support of using the DonkeyCar in education. I agree at beefing up the documentation is a good next step. I hope we can encourage others to help out with the documentation.
We are trying to decompose the process of creating and racing a DonkeyCar into small discrete concepts and create a dependency list of these concepts. For each concept we will then create printable cards that could be used at educational events. Cards are also grouped according to difficulty. The hope is that the content would be reusable for different ages and audiences.
I also agree that closed-source robots have limitations.
Like most of the rest of the CoderDojo training materials, these materials will be published under a creative commons share-alike/remix non-commercial license.