Having class outside could be a problem to many students. People might not like the weather or they just don't want to be outside period. There are many factors that could contribute to no class outside. Some of those factors could be Insects, Allergies and distractions.
Have you ever walked around outside with a fly flying around you? How many times do you hit at it before it finally flies away? Being outside can cause enormous amounts of insects to be attracted to you. Just think, if you don't like bugs, the outside environment is crawling with millions of them.
Another problem with having class outside is allergies. More than 50 million Americans are allegoric to something that can cause problems to their health. Allergies, which include runny noses, itchy eyes, and shortness of breath, are only some of the complications that people experience. If it were a nice day outside, you wouldn't want to be bothered by any symptoms of allergies.
How may times have you caught yourself gazing out the window looking at the clouds? Well just think if you were outside, you would be drifting off into space many times. These distractions could interfere with you learning and take away from the attention that you were having with your teacher. Distractions are not good if you are trying to learn or study in an environment that is prone for them.
In conclusion, right now the best place to have class is inside a building. Having class outside can interrupt the learning atmosphere in which students would start to loosing attention to the teacher and be more fascinated with what's going on outside. Inside a building, students could learn more and be more attentive in there studies. If the choice were left up to me, I would choose to have class inside where I would be comfortable and be able to learn.