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

HB 1889 amends Texas school finance rules to change how "average enrollment" is calculated for funding purposes. It replaces "daily attendance" with a standardized enrollment calculation method, affecting all Texas public school districts receiving state funding. Key provisions include: allowing districts to use the prior year's enrollment if enrollment drops due to military base closures, and permitting limited adjustments for districts impacted by disasters or large numbers of migratory students. The bill ensures districts with enrollment declines not tied to military bases receive funding based on up to 98% of their prior year's enrollment. These changes directly impact school funding allocations across Texas.