I would always include 'fun' in sessions. Take it you are using a range of learning strategies and initially did an assessment on preferred learning styles of your student (I'm sure you did, but I once came a cross a so called tutor who had never heard of dyslexia! I took over his student, I honestly believe he'd made things worse for the poor girl. I am sure you are a fully trained teacher who has thought about all this, but honestly I've met some people who have a degree and just assume they can teach.Hey I've given birth so I'm going to advertise myself as a midwife! Luckily these days few people like this ever get QTS). As you go along, do you get them to do sections of papers, so that you can say what level they are up to? Just that way you can say X is now effectively getting a C, or whatever. I would keep these records and put them in a simplistic form for the parents as you go along. That protects you and reasures the parents that you are doing the best you can. Also take in 'homework' and return with written comments. If the 'grade' would be too low to please the student, can you explain why? Insufficent effort, not applying the info you gave etc.