For a long time, high school science classes were arranged where students took Biology in 9th grade, Chemistry in 10h grade, and maybe Physics after that. Many schools are switching to "Physics First" due to the need to really understand chemistry before taking biology. However, it is helpful to understand physics, before taking Chemistry. This is proving to be a very successful method for introducing students to a really hands-on science. However, most textbooks are either all conceptual, and not enough of the necessary math, or designed for a much higher level of mathematics. This etextbook is designed for the typical 9th grade student with an appropriate level of math.