TX HB1157

Replaces "average daily attendance" with "average enrollment" as the basis for calculating public school funding throughout the Texas Education Code, fundamentally changing how schools are funded from attendance-based to enrollment-based

Defines average enrollment as the average number of students enrolled in a school district during a school year, with the commissioner required to adopt rules determining the calculation method

Maintains existing provisions for districts experiencing enrollment declines of 2% or more, allowing funding based on up to 98% of the prior year's enrollment (or 100% if decline is due to military base closures)

Preserves adjustments for districts with significant migratory student populations and allows commissioner adjustments for disasters, floods, or calamities affecting enrollment

Removes provisions related to calculating average daily attendance for flexible year programs, flexible school day programs, and blended learning programs, as these become unnecessary under enrollment-based funding