Texting teachers for assistance

A school not far from Milton Keynes has started allowing pupils to text their teachers / mentors for help with revision. The innovative idea does not give out teachers mobile numbers but gives a general number which then forwards queries to the teachers via a website allowing the teachers to monitor the site and provide progress. Why is the scheme so attractive to the students? - I believe it is three things convenience, novelty and privacy. BBC NEWS Education Pupils get revision help by text