HB 2378 proposes measures to address misconduct by public school employees and security personnel, particularly related to improper relationships with students. It updates the Education Code to expand a registry of individuals ineligible for employment in public schools due to past misconduct. The bill mandates reporting of employee misconduct to state authorities, requires school districts to take action against offenders, and establishes penalties for failing to report misconduct. Additionally, it amends the Penal Code to broaden the offense of improper relationships with students and enhances investigative and disciplinary procedures to ensure accountability.