Today during my walk through I saw second grade teachers all introducing the math concept of compensation to their students. Compensation involves changing one addend to a multiple of ten and adjusting the other addend to keep the balance. This math concept sets a foundation for algebra and chemistry in future years.
Mrs. Beaulieu in the following picture can be seen talking to her second graders about this concept. Seeing this lesson reminded me of how much I greatly enjoyed teaching compensation when I taught second grade.