IntroductionThe importance of a content-rich textbook, particularly in mathematics, is phenomenal. Some teachers often view the textbook as the only resource for classroom teaching. However, they fail to question or analyze the biases or perspective of textbook content, whether linguistic, cultural, or political (Darvin, 2007). By analyzing the content of textbooks, teachers can organize and order the material by prioritizing the information to be learned and highlighting the most important instructions that will be covered (Strahan & Herlihy, 1985). One of the most important components of any textbook is its academic language. Through analysis, the academic language of the text should be highlighted and studied to determine whether or not it coincides with students' reading level or how it influences students' work. Furthermore, by analyzing textbooks based on their academic language, the researcher gains perspective on how the language will help increase students' literacy skills. Analyzing Academic Language The first step in analyzing the academic language of the text is to identify level one, level two, and level three words according to Beck, McKeown, and Kucan (2002). On page 42 of the geometry book, the first page of section 1.6: Classifying Polygons, the book highlights the key vocabulary of this section on the side: polygon, side, vertex, convex, concave, n-gon, equilateral, equiangular, and regular . The first five of these terms are defined on this page. Other words that can be identified as level words are plane figure, segments, vertices, consecutive, internal, nonconvex, intersecting, property, collinear, and endpoint. The level of each word will be determined based on the importance of the word to understanding the rest of the...... middle of the paper ...... the outside world. ReferencesBean, T., Readence, J ., & Baldwin, R. (2008). Content area literacy: An integrated approach (9th ed.). Dubuque: Kendal/Hunt. Beck, I., McKeown, M., & Kucan, L. (2002). Choosing to Teach. Retrieved March 6, 2012, from http://www.readingrockets.org/article/40304/Concave. (2012). Retrieved March 10, 2012, from http://dictionary.reference.com/browse/ concaveDarvin, J. (2007): Teaching critical literacy principles to mathematics and science teachers. TeachingEducation, 18 (3), 245-256. Academic geometry vocabulary (2009). Retrieved March 6, 2012, from http://jc-schools.net/tutorials/vocab/index.htmlOrmrod, J. E. (2011). Educational psychology: Developing students (7th ed.). Upper Saddle River, NJ: Pearson Strahan, D & Herlihy, J. (1985). A model for analyzing the content of textbooks. Reading newspaper, 28 (5), 438-443.