My grade level partner is a very nice person, and we get along well. Unfortunately, I don't think that she's a great teacher. She doesn't seem to know how to teach the outcomes in a way that the students will understand. She also seems to have a hard time developing meaningful activities to help her students learn. I tried to help her out in the beginning, but she just doesn't seem to get it. I honestly don't think that she thinks there's a problem and, of course, I've never said anything. Normally, I would just do my own thing and let her do hers, but our school wants us to work more collaboratively with our grade level partners and maybe even do some team-teaching. There are two reasons why this concerns me. First of all, it's hard to collaborate with her because she has nothing to share with me, so I have to do all the work. Second, I don't feel comfortable with her teaching and working with my students. I wish that I could express my concerns to my principal, but I think that would be unprofessional. What do you think?