For online lessons I typically start by using a pre-made presentation going through whichever topics they have chosen to work on. Content includes essential definitions, step-by-step solutions to example questions and where appropriate, derivations of equations or formulae and diagrams to help aid the student with understanding. Much of my experience comes from studying, practicing and demonstration work for earth sciences so I like to try and use examples of naturally occurring scenarios to demonstrate many fundamental principles of chemistry to try and give students some added context and hopefully engage them beyond a standard classroom lesson. I believe that visualisation is a valuable tool for improving understanding of complex topics and try to explain material with the aid of a diagram or chemical reaction where possible. Practice questions and repetition are also essential to improving and are a great way for the student to put into practice the skills I am trying to teach and so I will often provide worksheets or past paper examples to work through with as much or as little help as the student requires (usually to begin with I will be quite involved and as a student spends more time on a topic I will let them try to solve problems independently and help when asked). This is of course just my preferred style of teaching and I am happy to be flexible and tailor my lessons to any student’s needs.