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Original material is licensed under the Creative Commons Attribution Share-Alike 3.0 license for '.ipynb' files, and under the Creative Commons Attribution 3.0 License otherwise. Attribution within the relevant source code is considered adequate for the purposes of the license, rather than during presentation/delivery, as far as applies to Flax & Teal Limited.
However, for work deriving from '.ipynb' files, note that you are nonetheless required to make course attendees aware of the license of your derivative work, which must be compatible with the Creative Commons Attribution Share-Alike 3.0 license, and inform them of means to access to your derivative work for their own usage according to the terms of the Creative Commons Attribution Share-Alike 3.0 license.