Tennessee Investment in Student Achievement (TISA) - As introduced, adds pre-kindergarten students with special education needs and their peer models to the categories of students who generate education funding through the TISA. - Amends TCA Title 49.

SB 679 updates Tennessee's school funding formula (TISA) to include pre-kindergarten students with special education needs and their non-disabled classmates ("peer models") who learn together in the least restrictive environment. The bill amends state law to define these terms and ensures school districts receive dedicated TISA funding for these students without reducing other state education funds. This change applies to the 2025-2026 school year and beyond, directly affecting pre-K special education programs and their inclusive classroom settings.