What Tacpot says is spot on!
One thing I liked about my PPL instructor was that he would go through the lesson with you and then at the end of the lesson he would say 'Ok , watch this!' and either have a bit of fun or show me some more complex handling and then it would be 'OK, now you have ago...' It kept you interested and also fed your thirst by giving you a snatch of what was coming up in future lessons.
Julian.