During the recent site redesign, many pages were renamed, so their url's changed.

Open the TKDTutor homepage and then open the page you wish to view using the 'Topics' menu.

Try Refreshing Your Browser

To facilitate faster loading of frequently visited pages, most browsers store the pages in a cache on the user's computer so the pages do not have to be downloaded each time the user visits them.  Sometimes, when visiting a site, the browser displays the stored version of the page rather checking for a newer version. To ensure you are getting the newest versions of pages, you should periodically clear your browser cache of stored pages. On Windows computers, go to Start/Settings/Internet Options/General/Temporary Internet Files and make file deletions and setting changes as desired.

To refresh an individual page while online so the newest version of the page will be displayed, click inside the page and hold down Control key while selecting Refresh on your browser or pressing the F5 function key.