Elementary math is not so simple!

I cannot emphasize enough the benefit to me as an educator in stepping back, reflecting, and relearning mathematics that I had earlier viewed as simple. Deepening my content knowledge with the ins and outs of addition and subtraction was a complex yet extremely fulfilling undertaking. I had no idea that the types of addition and subtraction story problems differed in such subtle and significant ways, nor did I have a coherent system to assist my students to move from the obvious to the abstract. I recommend that any teacher working with young children and mathematics read the work of the following educators and mathematicians who helped me...

What is pedagogical content knowledge?