Anterior cruciate ligament (ACL) injuries happen at a frequent rate, especially in girls and women. While there are many factors that contribute to ACL tears, teaching proper landing techniques and strengthening certain muscles can decrease the incidence of ACL tears, especially in women. This article reviews some of the high-risk factors that contribute to this debilitating injury and examines what physical educators can do to help prevent it. A visual checklist of proper joint landing positions is included.