The chairs in the Usability Desing And Testing Classroom are always giving students problems because their legs are out very far that they block students and hit other chairs. Even though, the chairs are comfortable when sitting on them, when trying to move the wheels of the legs bump into other wheels and cause them to jam up and stop. These chairs were not meant to be close to each other and are not usable for being close to each other in a classroom.

The chairs fail our conceptual model of an everyday classroom chair. A conceptual model shows consistency and a coherent system image of a chair in a traditional classroom. A solution would be taking out these chairs and replacing them with four leg chairs instead of five. The five leg chairs could perhaps be used in a one desk person in an area where there is enough space for the chairs to move. A four leg chair would help keep people from blocking and hitting each other every time they move or want to sit down.