We sometimes hear about a player being a "sponge". To me, that means a combination of interest, attentiveness, concentration, and attention to detail. How much do we know about a subject and how 'granular' can we get?
Can we create an assessment tool? It's the Internet. Impossible becomes I'm Possible.
Make learning THE GAME a game. You can create your own Socratic method tool. Drill down within an area (individual defense) and create subheadings like STANCE, OFF BALL DEFENSE, HELP, COMMUNICATION, and so forth.
Go to "Wheel Decide." Preparing for a job interview, a media session, a performance review? You can create your own uncertainty or training opportunity.