Draft notes, both formal and informal, artifacts of past courses, interactions and various technical projects. They are printed in various file formats, most of which is editable, or at least amenable to annotation.

Jupyter Notebooks are modern incarnations of the original Literate Programming ideas, which have shown nontrivial promise as tools in the facilitation of studying technical and semi-technical content. The Centaur Courses has also used them for a while now, with good results.

Partly printed and partly handwritten notes, derivations of trivial and obscure results, worked out problems of niche and general interest etc. The most frequently supplemented of the resources here.