Schoolhouse Rock counting by 5's http://www.teachertube.com/view_video.php?viewkey=6f344fb6a2d83c7c6787&page=6&viewtype=&category=
Dr. Tick Tock tells time http://www.teachertube.com/view_video.php?viewkey=e5297182c5a711d20bf2&page=7&viewtype=&category=