This a great comprehensive review of plant and animal cells and their organelles, cell basics, and the four main protists (Amoebas, Paramecium, Euglena, Volvox) and their organelles. There is a graphic organizer for plant cells, animal cells, and bacteria, with their organelles. There is a graphic organizer with the main protists and their characteristics and organelles. There is also vocabulary practice and follow up questions for each graphic organizer. There are keys for everything.