set speed to 0.25, show some situations from the video and make students find out what is going to happen (based on what the see)
https://www.youtube.com/watch?v=dT_fkwX4fRM
set speed to 0.25, show some situations from the video and make students find out what is going to happen (based on what the see)
https://www.youtube.com/watch?v=dT_fkwX4fRM