As of 2015, more than 4,000 school districts use Aesop as their substitute teaching assignment system. Aesop represents more than 1,000,000 teachers and 500,000 substitute teachers throughout the United States.
Aesop allows schools and substitute teachers to assign and accept jobs online. Aesop's website is accessible on mobile devices for both district staff and substitutes. Aesop also works with the Jobulator app, which constantly monitors Aesop and notifies substitutes when jobs become available.
Aesop provides both district staff and substitutes multiple ways of communicating with one other, optimizing the effectiveness of the system and satisfaction of employees. Districts can send messages directly to teachers and substitutes. Teachers and administrators can set preferences for substitute teaching assignments, including specific skill requirements that match qualified substitutes to absences, manually assigning specific substitute teachers to individual jobs and specifying a list of desired substitutes. District staff and substitutes can also leave feedback about their experiences.