Requires states that receive Elementary and Secondary Education Act (ESEA) funds to adopt and enforce minimum concussion-safety rules and to require local school districts and schools to create and follow written concussion plans (training, information posting, removal/return-to-learn and athletic-return procedures, and academic supports). The Secretary of Education may reduce ESEA funding to states that fail to comply. The law preserves existing civil and criminal liability and defines key terms such as concussion, covered school-sponsored athletic activity, and who counts as a health care professional for concussion care.