Check this 45 minute video clip about "The Maya: Engineering an Empire".
Check this 6 minute clip titled "Ancient Maya: Blood Sacrifice & The Ball Game".
Check this 10 minute clip titled "The Maya Base - 20 Number System".
Check this 15 minute clip titled "Mexico Unexplained: Maya Astronomy".
We are on the unit about the Americas which is Chapters 11 and 12.
To see the Internet version of Chapter 11, lessons 1, 2 and 3, click on the icon to the left to take you to that web site.