– Simplifies complex math concepts- Explains concepts using real-life situations and familiar objects- Clear linkage between text and photos- Words You Know section to reinforce text- IndexGrades K-4 National Science Standards- Science As Inquiry: I- Use data to explain- Communicate findings- Physical Science: II- Properties of objects and materials: shape, weight, color, etc., and their ability to react with other materials- Science and Technology: V- Tools help scientists make better observations