This is an excellent textbook for high school seniors or college freshmen, teaching the HOW and WHY of physics and not just the traditional math and concepts. Understanding of the concepts taught is checked at various points in each chapter by the reader answering questions in "Check Your Understanding" and "Check Your Figures" exercises. The end of each chapter has nine formatted benchmarks...Summary, Important Laws and Equations, The Physics of (whatever that segment has been about), Answers to Check Your Understanding, Answers to Check Your Figures, Glossary, Review Questions, Exercises, and Problems.