He added that £245 million a year is spent on detaining 16,000 offenders, who need to be educated whilst in detention, to use the time "sensibly".
Secure colleges are to be considered in a bid to improve the education received by young offenders.
More top news
How closely have you been paying attention to the news this week? Test your memory with our Friday quiz.
The FBI said three key elements of the Sony Pictures cyber attack led them to identify the administration in Pyongyang as the culprits.
Winston McKenzie has lost his title as Lambeth and North Croydon chairman during an investigation which has seen the whole branch suspended.