carychan,
I would like to share my church's situation to you. You said you teach p.4 to F.3. My church will let the students over F.3 to worship with the adults together. If P.4 to F.3 is in the same class, it is not a good arrangement. The age difference is so great. Our Sunday classes is K.1 to P.1, P.2 to P.4, P.5 to F.1,
For the teachers, most of them are their parents and some are the sisters around 25. We are willing and understand our obligation and pleased to accept the arrangement from the class leader.
Each teacher will in charge of 2 lesssons and take turn to handle it. We have 3 classes in our church and I will teach them only 4 times within 6 months. 2 times in my daughter's class and 2 times in the senior class.
Do you have the course leader for this sunday class? If you want to know more, pls let me know.
God bless you.