Botsman and Rogers (2011) described four key principles that any sharing economy requires to be a success: trust, capacity, critical mass, and a belief in the principles behind sharing. For the purpose of our OER sharing economy, trust is required in that users of the site must believe that other people are providing useful, good quality OERs, and that the ratings and reviews of the OERs provide enough information and analysis for the users to be able to appropriately choose the OER that is right for them at any given point. Capacity is also required, and means that people must have resources available to share - the idea behind capacity being that you have more than you need, and the sharing economy enables a way for you to share that excess capacity. Critical mass refers to the idea that the sharing economy is only successful if there are enough people using it at any given time. If no one shares any OERs, our sharing economy will never get off the ground, or if people suddenly stop sharing, the sharing economy will cease to function. The belief in the principles behind sharing means that people believe in and support the sharing economy. If people do not believe that their contributions of OERs are valuable, then they will not contribute them, and the sharing economy will not function. Using OERs on the website also contributes value, as the more people that use a resource shows it’s value to others. The mere act of using the sharing economy adds value to it.