Tennessee Investment in Student Achievement (TISA) - As introduced, requires the department of education create a process for LEAs to provide real-time enrollment data so that funding allocations are adjusted continuously throughout the year; revises criteria for infrastructure stipends; establishes that allocations of education funding to LEAs for the state's per student funding for charter school students must be made no later than the date by which LEAs are required to pay charter schools for each student. - Amends TCA Title 49.

HB 146 requires Tennessee's Department of Education to establish a process for local school districts (LEAs) to submit real-time enrollment data, enabling continuous adjustment of education funding throughout the school year. It revises infrastructure stipend criteria to base payments on a 2% annual student enrollment growth threshold and classroom space needs, and mandates that state funding for charter school students must be distributed no later than the date LEAs pay charter schools. The bill directly affects school districts, charter schools, and state education funding mechanisms by changing how allocations are calculated and delivered. These changes apply to the 2025-2026 school year and beyond, as outlined in amended sections of Tennessee Code Annotated Title 49.