I understood why we have been practising the "estimating/predicting" and "checking our prediction" kind of activities with our children from today lesson.
"Benchmark" is the key to it. Let's take a look at this question:
1) Can you tell me if this circle ( O ) is big or small?
Now think again. How do you find if the question is phrased in this way:
Then we move on to teaching children about a big animal and a small animal.
Finally we moved on to a more abstract thinking when the big cat is now a small animal when we compared it with a lion.