Learnability: This interface is pretty learnable and self explanatory. The home page to enter in requirements clearly tell the user to add either a class, an interest, or a skill
Efficiency: This design allows a team leader to entere in all the requirements on a single page without having to navigate elsewhere. However, they have to both enter in a requirement and then order all their requirements by dragging around the requirement boxes which may be slightly efficient unless they automatically enter in the requirements in order of most importance in which case they will be correctly ordered initially. The student results page is pretty efficient because it allows team leaders to be able to see students ranked by their preferences and not have to make difficult decisions about which students are most qualified. The team leaders can easily view each student resume through a popup, so they never have to navigate elsewhere to see more information about a student. They can also select the students they wish to email straight from the results page and enter in the email directly from a popup window, so there doesn't need to be any navigation to external pages.
Safety;