For instance,, there was a teacher who sent 5 vocabularies 3 times a week via text messages. this is based on a research! and the result is that the 'SMS students' got higher score than the 'paper students... :) (paper students are students who use papers or books to study)
But,, there is negative side from this approach.. The teacher should be very diligent to send all this messages every day, coz it's very tiring and your fingers will be flat! wkwkkwk... :D