Relating to the use of average enrollment for purposes of the public school finance system.

HB 1157 redefines how Texas public school districts calculate average enrollment for state funding purposes, replacing "daily attendance" with a new average enrollment metric. It specifies that districts experiencing a 2% or greater enrollment decline must be funded based on either the previous year's actual enrollment (if due to military base closures) or a maximum of 98% of that previous year's enrollment (for other declines). The bill also allows adjustments for districts with high numbers of migratory students or those affected by disasters like floods or extreme weather. These changes directly impact all Texas public school districts receiving state funding based on enrollment metrics.