Visual schedules are extensively supported by research (and personal experience) to increase engagement and cooperation of students with and without disabilities.
The WIAT-III is a high stakes assessment for many children. It is important to obtain the most accurate assessment of a child's abilities while minimizing the influence other performance factors. Therefore, assessment professionals use many tools to increase students' engagement in the testing session such as minimizing distractions, offering frequent breaks, and utilizing visual schedules.
The file is a word file so that you can add or subtract subtests as needed to tailor-fit your assessment session. Also, feel free to copy, paste, and insert "Breaks" as needed for your student.
Present this visual schedule to students at the beginning of the assessment session and between subtests to structure your session. Use the boxes next to the subtest to schedule off the activity as you go. The visual schedule should not be visible during the administration of subtests as this might be distracting and is not in accordance with the standardization of the instrument.