I have never viewed the Monkey Business Illusion until today. Before you click and follow the hyperlink  here is what you need to do:
1. Instruct viewers that they are going to watch  video of a group of students passing a basketball to their team players. There are 3 players wearing white t-shirts ans 3 players wearing black t-shirts. You are required to count the number of times that a person with a white t-shirt on throws the ball, not the people wearing black shirts.
2.Please note, that this is gender bias, women usually get the correct answer above men.
3. Watch the video and count the number of throws.
4. Pause the video upon the last throw.
5. Ask how many passes (the answer is 16).
6. Then replay the video, this time asking the participants to focus on any changes on the set, not to focus on the number of passes.
7. What do you notice?

ANSWER: (a) A gorilla actually enters the scene, (b) a player leaves and (c) there is a change in set colour.

What does this have to do with education? According to Ian Jukes and my interpretation of his presentation, this is known as perceptual blindness. Before watching the video you were primed with a specific task and the anticipation was increased with the statement that women perform better than men. Consider, how many things might you be  missing in your community, your classroom and your life? What might you be ‘blind’ too? Isn’t it time we open our eyes?

Source: Ian Jukes IWBNet Master ITL Conference 2013