Maths tutor teaching university preparation students from worldwide to the UK

I have a master degree in Econ Tech. I have been teaching at EF as the university preparation maths teacher for 19 months now. I used to deliver the teaching via power point to attract students' attention and increase their learning motive. My students are from everywhere worldwide and they are mainly not native in English. Most of them are in the range of 17 to 21 years old. They are very impressed to my teaching because they feel they not only understand what I deliver to them but also the care about them about their stay in the UK. The way I deliver the teaching is from very basic ideas and concepts of maths to make students really understand and go gradually to more deeper concepts and inspire students to have more understanding of the topics they have to learn. The reason is maths is a subject full of virtual concepts. One of the good ways to learn maths is understand the basis and derive the concepts and equations / formulas from there. The last, but not the least, one of the best way to deliver teaching and make students interested in maths is interaction and in class exercises with progress checks. So doing, it helps me where the students are up to so that I can adjust my teaching tempo and do the follow up for each of the students to ensure they are up to the maths level both the syllabus requires and the students need to.