Replacing organs or tissues with lab-created counterparts; engineered kidneys, livers and hearts. Science fiction? Not any more -- scientists are already successfully growing all kinds of organs and tissues in the lab.

All 50 Secrets of the Sequence videos have an accompanying classroom-tested lesson that encourages students to further explore the video topics. Each lesson includes background information, state and national science standards, discussion questions and answers, teacher notes and an activity that will ensure a hands-on, "minds-on" experience.