The teacher began the math lesson by explaining the outline and ensuring students understood the tasks and vocabulary. When demonstrating a calculator simulation, one student asked a question which engaged the others. The teacher showed how to zoom and find limits using tables, substituting values. Questions from students showed they understood when the teacher explained concepts through simplified examples and different representations. Students smiled when they understood a difficult concept and asked more questions. The teacher tested students who competed happily and worked problems out together on the board with the teacher's help. While most stayed focused for over 1.5 hours, some chatty students laughed more but stopped when the teacher paused to wait for them in silence.