If you already have a sound or video file you'd like to practice with, copy it to your XHTMLclass folder. Or create a subfolder in your XHTMLclass folder, and copy the file to that subfolder. Then create a new page from your XHTML Template file, and try linking or embedding to your sound or video file.

If you don't have a sound or video file, consider downloading a MIDI file from the MIDI site referenced in this lesson's Supplementary Material, or download a video file from the HubbleSite referenced in the Supplementary Material. Then link to, or embed, that sound or video file. You should be able to just copy and paste the appropriate tags from the lesson. Then change the relative path (or paths) in that tag to correctly point to your sound or video file.