The more I teach, the longer it takes me to get through the material. In my first few years of teaching, I focused on completing activities. Let me emphasize the past sentence, I focused on completing activities. I would lead the classroom and just get through the material. If I was writing things on the board and students were packing up with a minute to go, I would still teach. Furthermore, I would continue to write down things for the students to complete a worksheet if the bell was about to ring. I taught bell to bell. I was a good teacher.
An activity that used to take ten minutes, might take an entire period now. This is mainly because I actually teach the concept and/or skill. I spend more time building or activating background knowledge, movement activities, writing, reading, allowing all students a voice, and ensuring all students have an understanding. It takes more time because I am not as concerned about the teaching as I am the student learning that takes place.
For example, look at the image below. For the activity below, I would model the first one with whole class instruction. Then I would have the class try the second one. Finally, I would walk around the room and help students with the rest. If they didn't finish them, I would just tell them the answer at the end. To get through ten statements, it would take about ten minutes.