Studding of Judo techniques and tactics is a diverse subject. When Dr. Kano created his Kodokan Judo on top of tradition Japanese jujutsu the one of his objectives was to codify selected techniques to make studding of the art more manageable. Studding of Judo classification is as well part of Judo technical studies.
On judo-for-self-defense.com Judo technical elements grouped in the following way:
None of this (with partial exception for formal Judo classification) can be studied by the book alone without participating in dojo training with qualified instructor. To avoid the temptation, I’m not putting any detailed explanation of the concrete techniques on those pages (with exception for wrist grip release as illustration of tactical principals).
Judo and self-defense instructor can (and I hope will) find those pages beneficial as he’s refining his instruction curriculum.
Students can find questions they need to ask their instructor and to get themselves on the right learning path.