I am an engineer and pursuing MSc in Quantitative Finance in Manchester. My experience involves taking classes for the below set of students- 1. NGO students aged 5-18, from Grades 1 to Grades 12. They generally used to be in a group of 5. The subject topics were Maths and Science. 2. I have taken classes for adults in a group of 30 continuously for about 5-6 hours. These were on finance topics.