For example, on the spelling site, you can use your own word list and then the games will reformat so that you can play practicing your own words.
If the computer was used, consider paying a professional to reformat it and reinstall programs so it will run smoothly and efficiently.
Don't try to reformat, reinvent, repurpose, reparadigm, reimagine, or anything else.
The flexibility of CSS is impressive, and the fact that it allows you to reformat hundreds of HTML web pages with a single change in one .css file makes it a tremendously powerful tool to manage websites.