Book excerpt: Developed for beginning chemistry 6-12 teachers, this comprehensive, state-aligned guide covers the eight core competencies: concepts of matter; energy and its interaction with matter; bonding and molecular structure; chemical reactions and stoichiometry; atomic theory and structure; nature of science; measurement; and appropriate laboratory use and procedures. Mastered the core content? Practice for the real exam with 125 sample test questions that include full answer rationales. If you need to pass the first time, you need an XAMonline study guide.