This is MCPS's description of the test day from the FAQ:
7. What was involved on test day?
On the day of testing, the students completed a wellness question, a non-scored brief essay prompt, and a
three part CogAT® assessment. The full duration for this was about an hour.
Students who did not feel well enough to take the test were asked to alert the teacher and stop. Students
were provided a make-up day. Students also completed a brief essay in response to a prompt. This is non-
scored. Student had 10 minutes to complete this exercise.
The CogAT® assessment was completed online by the student, and each section was a series of multiple-
choice reasoning ability questions. Each section was timed for 10 minutes each. During the 10 minutes
students can advance or go back to questions in the section. Students were able to complete sample
questions with the teacher prior to completing their own sections. The percentile provided is the result of
the three assessments combined to reflect a composite percentile.
https://www.montgomeryschoolsmd.org/uploadedFiles/curriculum/specialprograms/elementary/Understanding%20the%20CES%20Selection%20Process%204.419(1).pdf