Students may have a lot going on outside of the classroom: at home, online (including social media), social circles and in other activities. Barriers have a lot of weight on the students' ability to learn, so instructors and teachers are like superheroes, using their superpowers to remove the various barriers from the students. The students, in turn, can express themselves according to their own personal learning styles, and the barrier removal gives them the freedom to confidently display said expression
