The term 'CHECK THE ___' can be completed with the words STEM, READD, and REIN. STEM stands for Science, Technology, Engineering, and Mathematics, and is a field of study that focuses on these four areas. READD stands for Research, Education, Advocacy, Development, and Design, and is an approach to problem-solving that involves researching, educating, advocating, developing, and designing solutions. Finally, REIN stands for Research, Evaluation, Innovation, and Networking, and is a process of researching, evaluating, innovating, and networking in order to create new ideas and solutions.