Does this sound like ADD?

I'm a Junior in High School (16), and I'm uming I don't have ADHD cause the H stands for hyperactive, which I am not most of the time. I'm having a very hard time concentrating in some of my cles, two bigger ones being Physics and Consumer ED. Now I don't find these two cles to be particularly exciting, but I try really hard to focus when the teacher is explaining things. I'll tell myself, "just listen to the teacher, it's really not that hard". Yet I can't seem to keep my focus. I'll drift off into another mind set and when I realize I'm not listening, I've missed a good 5-10 minutes of what was being tough and be back into dreamland within another minute or so. This doesn't only happen when I have plans after school or am looking forward to something (Although it does get worse if so). I will drift off regardless of plans. For example, the teacher could say something that sparks my interest, and then I will go off and think more in depth about it and not listen for about 5 minutes. Or I can think of something completely off subject and just keep going off that. I've tried to keep all distractions in my backpack, but I don't really need anything to start me thinking about something else, just my mind. I feel like I could understand Physics so much better if I actually had a clue what I was doing. Same for Consumer ED. You don't really need to learn any equations, but there's a lot of vocab in that cl that I miss because I'm somewhere else in my head. This also happens sometime in Biology, but only when we are on a subject that isn't of interest to me, which isn't very often for that cl. This doesn't effect me as much in my other cles because I only need a little bit of something before I get the material in them. When I was taking Psychology, (the same hour of the day, just last semester), I could focus perfectly. I think it's because I really enjoy that subject and want to pursue further into it. I can usually focus on anything I'm interested in. The same goes for projects. I can work very intensely on something I'm interested in and get it done quickly. Then there are time where I will be working on something, such as a drawing or crochet project, and I will loose interest and not pick it up for a long time, if ever again. I will become interested in many things (mostly art related: Origami, Crochet, Drawing, instruments) and work on this skill for a month or so, then suddenly stop. Although I will come back to it, I don't usually keep working on it as hard as a had previously. Does this sound like ADD? Thanks.