Book excerpt: Whether you're reviewing Numbers and Operations or trying to master the Properties and Techniques of Algebraic Operations, this guide provides the competencies and skills that directly align with GACE's current test standards and subareas. Its two, 60-question practice exams include question rigor, skill reference, as well as full answer rationales. Save yourself time and money; use this XAMonline guide to enhance your study experience and pass your certification test the first time.