There are multiple sources of information that contribute to measuring student learning. The WESD uses a variety of assessments to help teachers and parents know if students are learning. These sources include standards-based District assessments and teacher-designed formative assessments in grades K-8; Arizona’s new State test, AzMERIT, in English language arts and mathematics for grades 3-8; and Arizona's Instrument to Measure Standards (AIMS) for Science in grades 4 and 8.

The WESD uses the results of the assessment tools to help students understand their strengths and weaknesses, to help parents understand their child's progress, to place students at appropriate instructional levels and to determine program effectiveness.