Lab safety begins with the teacher. Teachers must make learning how to be safe an integral and important part of their professional development and work. Teachers who are unfamiliar with laboratory instruction should take whatever steps necessary to prepare for the unique challenges associated with safety in conducting laboratory investigations and demonstrations. Attending workshops and conferences, along with researching safe laboratory practices, can provide a foundation for understanding and implementing safe laboratory guidelines and procedures. Developing an atmosphere of "safety first" is perhaps the most important aspect of establishing the habit of mind for lab safety. Here the authors offer suggestions that will help lay down the foundation for a safe laboratory climate.