From the five lines on a music staff to the seven colors of the rainbow, all the way up to the famous 100th day of school, Number 1 Teacher: A School Counting Book takes a by-the-numbers approach to helping young readers understand and identify many of the concepts and lessons they'll learn in elementary school. There are 3 forms of matter we learn in science class--One is liquid; two is solid; and the third is gas. Geography, music, and how to tell time are just a few of the many topics featured. From the husband-and-wife writing team who brought us T is for Teacher: A School Alphabet now comes Number 1 Teacher to help students focus on what counts to make the most of their school days.