(replying to em10)
The gist of the speech that you linked to was that 60% of the offenders apprehended, so far, had a history of criminality already. No attempt, on that occasion, to attribute the behaviour to any causative circumstances.
It seems that he and his advisors have had a little think amongst themselves and come up with this scheme, since then.
Now, you can call me entirely lacking in imagination, if you like, but I can't see the demand for extra lessons (during treasured summer holiday time, no less!) coming from these kids themselves ("mum, I'm falling behind in class and need help"). Pride in their offspring might prevent the parents from acknowledging the problem, let alone applying for a place so, at a guess, it will have to be the schools who identify the needy and enforce their attendence.
If the kids are unwilling participants from the start, they'll be even less engaged in their special lessons than they are during term-time, will they not?
Every time a politician announces a new scheme, my first thought is "OK, show us the piles of constituency letters demanding this thing be implemented". Anything else is just a shameless PR exercise.