When co-teaching, if one teacher is presenting a mini-lecture on a new concept, the other can look up the concept at www.handspeak.com and be prepared to show the sign to the students and have them repeat the gesture. This keeps both teachers actively engaged in the instruction and increases engagement and retention for students.
Give it a try right now to see how quick and easy it is! Think of a concept that you will be teaching in the next week (for example, compare 2 things) and look it up at www.handspeak.com