These materials were developed by Wiki Knights, a student organization at the University of Central Florida.
The following are other great resources available in the public domain or Creative Commons for studying concepts in computer science.
AlgoVisionKnights - Visualizer for sorting algorithms, search algorithms, AVL trees, Dijkstra’s algorithm, and more. Original version created by Hasan Assaidi, Michael Lowe, Stefan Werleman, and Matthew Weston. (Source Code)
CS50x - Harvard University’s introduction to computer science and the art of programming. (Source Code)
The Missing Semester of Your CS Education - MIT - How to master the command-line, use a powerful text editor, use fancy features of version control systems, and much more! Learn how to be proficient with your tools! Created by Anish Athalye, Jon Gjengset, and Jose Javier Gonzalez Ortiz. (Source Code)
UCF Foundation Exam Practice - Created by Vijay Stroup. (Source Code)