I take Math HL on pamoja and I do not recommend doing any classes unless you are extremely self motivated. It requires a lot of self studying. In order for you to be successful it is key that you have time in your school day to do the work. Otherwise you may not have enough time to do it. I took an additional class (physics HL) on top of my other 6 and I became very overwhelmed. But it is such a great experience to be able to have classmates from around the world.