My lessons always involve the basic concept of what are we learning today, what is our objective? Pupils must understand why they are attending a lesson and what they should be getting out of the lesson. Progression must be obvious and providable, does the pupil know how they have improved that lesson. And doing it in an interesting and fun way is only an advantage.
Though most importantly what does the pupil need to learn, all lessons must contain new information for it to be a lesson! With revision sessions I believe that various methods and strategies must be used to help the pupils review what topics they are confident in and which aspects of their education are lacking. Real life scenarios are a good method for pupils to envisage the idea and when completing exam style questions the fact of 'why is that the answer' must always be addressed.
I like to remember a simple idea, not every pupil is the same. We do not all learn the same way and at the same speed. Tutors should get to know the pupils' working style and use that to enhance lessons and to make them accessible at all times. As i said at the start of my presentation, we as teachers must know what we expect from the pupils' development in the lesson and how the pupils are going to achieve that standard.
My last thought on lessons is also very easy, has the teacher actually made the pupil interested in the topic that they are studying?