Experienced scientist and lab demonstrator in chemistry - Chemistry tutor with John

I have known John for almost 25 years since school and he was the obvious choice to ask when I needed help to go through topics in A level chemistry that were causing me problems as I wanted to re train into as a laboratory assistant. He patiently explained each topic using worked examples and where possible past exam questions. His approach of going through the question or topic step-by-step and explaining concepts at each stage was instrumental in me grasping those topics I was struggling with.
I found the use of homework given to be of particular help because it enabled me to reinforce what I had learned in the lesson which I found was vital for the exam. Thanks John!!