Henrietta Lacks was an African-American woman who was the unwitting source of cells (from her cancerous tumor) which were cultured by George Otto Gey to create an immortal cell line for medical research. This is now known as the HeLa cell line.
Cubes Math Anchor Chart~ Perfect for upper elementary and middle school students! Great steps to take to solve challenging word problems. Cao's Grade Math: Week of September 2013 - October (Step Challenge Chart)