As school districts face ongoing and, in some cases, worsening staffing challenges, policymakers often lack the timely information to make key decisions to address these challenges, as administrative data is usually available too late to inform policy debates or decision making. We summarize research that uses teacher job postings data from public school district websites in Washington to identify disparities in hiring needs across districts and content areas. We find that job postings provide timely information about teacher hiring needs at low cost and present a promising area for research on school hiring challenges.