This site features a variety of holiday lectures on various science topics. Educators interested in using these free Web casts in the classroom must fill out an electronic registration form. These lectures are primarily intended for "high school students in honors and Advanced Placement biology classes," although "other high school students and undergraduates can certainly benefit from the content of the lectures." Detailed synopses of these lectures are available on the Web site, which should help teachers decide whether the material is appropriate for their students.