This package contains both the SUS Calculator and 150 page Practical Guide to SUS. It contains many examples, graphs, tables, benchmarks and best practices for using SUS. The calculator helps prevent improper coding, compares two SUS Scores statistically, handles missing values, computes sample sizes, converts SUS scores to percentile ranks and letter grades and checks the internal reliability of the responses.
The education edition contains the same features as the commercial edition. The site license permits you to distribute as many copies as needed (electronic or printed) to students, colleagues and other members of the educational community so long as the purpose is for instruction or other education-related purposes. You may post a link to the product on an internal (non-publicly accessible) course web-page. The educational license does not expire so you may use it in perpetuity.