Science teachers and former BrainU participants, Kris Bakkum and Charlene Ellingson, are featured in this 4-minute video discussing the 5 levels of the Critical Response Protocol, the subject of a paper they co-authored with Dr. Janet Dubinsky and Dr. Gillian Roehrig. Critical Response Protocol was published in April 2016 edition of The Science Teacher, the magazine of the National Science Teachers Association.