I use this worksheet as an introduction to stem cells and cell differentiation in my bilingual Spanish classes. Students are asked to read and annotate a brief summary on cell differentiation and stem cells, watch a few overview videos online and answer check-for-understanding questions. You can do this as a whole class, or it can be done individually as a self-guided introduction.
I have uploaded this in a .docx format so you can modify and differentiate to meet your classroom and students' needs. Enjoy!