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Substitute teaching in Phoenix Union High School District: how the Frontline job board works

A plain-English guide for substitutes in Phoenix Union High School District (Arizona): how postings are written, and how to get the jobs you want on Frontline.

By the Sub Concierge team · Updated September 30, 2026

Phoenix Union High School District, in Arizona, posts its substitute jobs through Frontline Absence Management (the system many subs still call Aesop). If you're on the sub list here, everything below is about that board: what shows up on it, how it's written, and what it takes to get the jobs you actually want.

How Phoenix Union High School District writes its postings

Postings here look like this (real titles from the board, teacher names removed):

  • Art
  • Communication Arts (English, J
  • Science

Grade level is not always in the title, so open a posting before assuming the age group.

When jobs post in Phoenix Union High School District

We don't have enough postings tracked in Phoenix Union High School District yet to give you real numbers. What holds almost everywhere: the biggest wave of postings comes between 5 and 7 AM local time, when teachers who woke up sick call in; a second wave lands the evening before, when planned absences get entered; and the good full-day jobs from either wave are gone within a minute or two of appearing.

How to get the jobs you want here

  • Get on the preferred lists. Teachers in Phoenix Union High School District can name preferred subs, and preferred subs see a posting before the rest of the list does. A short note to a teacher after a good day is the highest-return thing you can do.
  • Know the board's spelling. School names and titles above are how the district actually writes them. Filters and alerts that don't match the spelling silently miss jobs.
  • Decide your rules once. Which schools, which grades, full-day only or not, how much notice you need. Subs who decide in advance say yes in seconds; subs who decide per posting lose the race.
  • Cancel cleanly. Frontline tracks cancellations, and districts notice. Take fewer jobs and keep them.

For the mechanics of the board itself, read how the Frontline job board works and why jobs disappear in seconds.

Sub Concierge is an independent service operated by Sub Concierge LLC. It is not affiliated with, endorsed by, or sponsored by Frontline Education or Phoenix Union High School District. School and posting names are shown as they appear on the public job board; timing figures are aggregates from postings we watched and may not match every job the district posts.