Elodie,
Are you able to teach only 10 students in your program? Have you been able to get quality student to student interaction with 10 students in a course? I am just curious. I agree the technical nature of the content, especially if students don't have the prerequisites, can make it difficult with more students. The optimal number the majority of respondents report is 15-20, but the optimal number is based on individual circumstances as well.
Herbert Brown III
