This paper describes how the System Usability Scale (SUS) has helped in improving and making a software tool called the Classification, Identification, and Retrieval-based Collaborative Learning Environment (CIRCLE) more efficient to use. In an SUS survey, participants are asked to rate 10 predefined questions on a scaled range from strongly agree to strongly disagree. The first survey was done where the participants also indicated the positive and negative points about CIRCLE along with some additional comments. A Sitemap was developed using GoJS tool which helps in designing a graphical image of the same and makes it more user friendly as it also tracks the current location of the user and also directs the next pages where he can move from the current location. A second survey was conducted and a comparison of the first and second survey results was made.