TExES Mathematics 812 135 Teacher Certification Exam - XAM TEXES Author:Sharon Wynne Includes 21 competencies/skills found on the TExES Mathematics 8-12 test and 125 sample-test questions. This guide, aligned specifically to standards prescribed by the Texas Department of Education, covers the sub-areas of Number Concepts; Patterns and Algebra; Geometry and Measurement; Probability and Statistics; Mathematical Processes and Pers... more »pectives; and Mathematical Learning, Instruction and Assessment.« less