LISD is an urban school district with 30 schools. For the 2026-2027 school year, classes begin August 10 and end May 28. The calendar sets aside 3 additional days (February 19–March 29) that may be used as weather makeup days if needed. This calendar includes 6 professional development days, 4 early-release or half days — useful to know when planning childcare. Standardized testing windows: Standardized Testing Window (December 1–December 11); Standardized Testing Window (April 6–April 30); Standardized Testing Window (May 3–May 14).
Also known as LISD.