This document discusses stem cell research and provides TEKs (Texas Essential Knowledge and Skills) standards related to biology, English language arts, and United States history. It begins with a brief definition of stem cells as cells whose function in the body is not yet determined. It then provides three TEK standards about cell specialization and differentiation, organizing information from multiple sources, and synthesizing research into written or oral presentations with proper citations. The final TEK standard relates to understanding how people from various racial, ethnic, and religious groups adapted to life in the US and contributed to our national identity.