Setting: City similar to the City of London. Oppressive government. People live in fear and merely trudge on in their dull lives.
My characters: Part of a cell of a large national resistance group. They live in a small flat in an apartment on a main street. (I don't really know how to describe it, but think of the apartment where Banner lands on Earth in Infinity War)
My prodigy: She's the leader of this particular cell, and has extraordinary telekinetic abilities.
My protégé: He's of a similar age, and also has the same potential as the prodigy. However, he was badly injured recently, and after waking from his coma, forgot anything which happened before his battle. He was recruited by the resistance cell when he 'discovered' his telekinetic abilities.
Before the protégé was attacked, he used to be of a similar power level to the prodigy (he'd been trained by an organisation seemingly sympathetic to the government). But, although he has all of that power, he can't remember how to use it, so will need training by the prodigy to relearn how to use his ability.
My problem: When he'd been trained before, he'd been trained for years in an academy/dojo by other people with his ability who were professionals. He had had access to high-tech equipment and lots of space and room due to the size of the academy (which was expensive, but paid for by the aforementioned organisation). However, now he's in a relatively small place shared by around ten other people as well as the prodigy, who's never taught anyone how to use their powers. So, how could my magical prodigy train my protégé?
The most similar situation I could think of is Neo being trained by Morpheus in the Matrix, but he was being trained in a simulation (think of the scene where he jumped between buildings), so there were next to no restrictions upon them.