Those drills and skills are specific to jobs on the ship.  

And the assumption is that you have trained crew to start with, who have already been through the local education system on their homeworld, and then broadly trained for their own on-ship job by the Navy.  

On-ship drills are things like getting from where you are when the alarm goes off, to your battle station, and getting into the appropriate gear, and getting things ready.

(IE if you are a gunner, scramble to your gunnery console, run weapons diagnostics, check sensor feeds, greenlight your station status, and prepare to engage opponents.  If you are engineering, scramble to your assigned engineering console, suit up, and be ready to run things on manual and/or do damage control.  etc.) 

Useful for your job, but not particularly useful in terms of general education. 

OTOH, the Impies *might* have things like literacy and math skills for people from primitive cultures.  I suppose it depends on your campaign.  

("Oh, him?  Yeah, interesting story.  The bosun on one of the landers was drinking in some tavern on a primitive backwater, on liberty.  There was a misunderstanding, and a fight broke out, and this local saved the bosun's life, but that got him in trouble with the other locals.  The bosun talked to the senior chief, who talked to the LT,  who talked to the skipper, and the skipper signed him up as a "local recruit", and seconded him to the ship's Marine complement.  They taught him how to use a vacc suit, and rifles, and helped refine his hand-to-hand, and he's helped them up their cutlass game.  It works out.  Still working on his reading, though.")

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