Changing times
We were 75 minutes into class and her engagement and grasp of the content was wonderful! 😊 She had, with minimal guidance, derived the formula for the length of an arc of a circle by applying proportional reasoning. When a student makes a cross-topic connection like this, it is rewarding! 😇 Now, we were solving questions to cement her understanding of the concept. We reached the last question in the set: The second hand of a clock is 10 cm long. How far does the tip of the second hand travel in 20 seconds? She racked her brains for close to 10 minutes before concluding that she was stumped! 😵 I asked her to share where she was getting stuck. She replied that she didn't know the speed at which the hand was moving - so, she couldn't find the distance that the tip had travelled. I realised that she was thinking of the {speed = distance ÷ time} formula. So, I gave her a hint that knowing the speed at which the hand was moving wasn't required in this case. In addition, I...