From the start, I took note of teaching styles and behavior management that did and did not work. On that first day, the first grade students used calculators during math class. I was surprised that they were capable of using calculators that young.
Some teachers allow students to count with their fingers.
I have found that using a number line and counters are better methods. I was pretty rigid in those beginning days. While I still maintain control, in fact I do better now, I have loosened up some. I am learning how precious time is and how little time students have in class. I am improving in my ability to manage teaching time and transitions.