I have successfully used this testing log for the last two years. At the beginning of the year, you go through your campus list and put all of the re-evals in their respective months, based on due date. This will allow you to see how busy your year will be, and bump up evaluations when needed. As Initials and Special Requests come up, you put them in the months when they are due.
This at-a-glance worksheet is so helpful in planning, and I keep it open at all times. If you store it in your Google Drive, Dropbox, or OneDrive, you can access it from any device, anytime. So when your administrator texts you at 10pm asking when a student is due, you can answer their question with very little effort.
Just a couple of useful tips I've found, when I have a student with an open consent and am currently testing, I highlight the Consent box yellow (with the date of consent inside) to show that they are currently being tested. If I'm waiting on a consent to come back, I highlight the empty box yellow. Once the student's testing is complete, I highlight the entire row in the color of the header to show that that student's testing is complete.