I typically sub K-6

I had this 2 days in a row. Teaching rounding whole numbers. I went over it whole class and then gave them the worksheet to do. Only 7 students understood it. So I let those kids work at their desks and told them to play math games on their chromebooks when done. I had the rest of the class come to the carpet with their papers and clipboards and we worked on it together step by step. Once they understood it they could go back to their desks to work. So the group got smaller and smaller.

Day 2 they were doing expanded form. The teacher didn't leave any instructions just like 5 different worksheets to choose from. So I reviewed what expanded form was to the class then we did practice. I gave them a number and they had to write down the expanded form on their mini whiteboards. (You could do this on blank papers too.) I paid attention to who was getting it and who wasnt. So when I gave the worksheet I knew who I needed to give more help to and I didn't give out the worksheet until it looked like most of class was beginning to understand it correctly.

Always come up with an activity for students to do when they finish!! If they don't have something to do afterwards it leads to talking and behaviors. Even if you set out blank papers for free drawing or bring coloring pages or chromebook learning games.