Feel free to use the information provided in TKDTutor for non-commercial purposes. The information may be used educate your students, after all that is why TKDTutor.com was created.
Since I dislike hypocrites, I have no problem with people using the information in a critical context, after all, I am critical of a lot of the information put out by others.
Please include one of the following citations (or something similar) when using any information from TKDTutor.
Hartman, Ronald D. "Name of article." TKDTutor. Date article last modified. Web. Date article was accessed. <URL of article web page>.
Example: Hartman, Ronald D. "History of Taekwondo" TKDTutor. 01 Jan 2012. Web. 15 Mar 2013. <http://tkdtutor.com/index.php/taekwondo/history-of-taekwondo>.
Hartman, Ronald. TKDTutorage, "Name of article." Last modified Date article last modified. Accessed Date article was accessed. URL of the article.
Example: Hartman, Ronald. TKDTutorage, "History of Taekwondo." Last modified 01 Jan 2012. Accessed 15 Mar 2013 http://tkdtutor.com/index.php/taekwondo/history-of-taekwondo.