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...