Wow! Things turned out much worse than I thought. I didn't really anticipate all the problems that arose. And there seems to be countless mistake that I made.
I feel these stuff can be improved:
1) I shouldn't have allow the class to congregate in the front of the classroom. All discretion should have been exercised in organising the class.
2) I should have avoided the lift area. This will prevent straying.
3) More could have been done to monitor the class movements.
4) The sample should not have been passed round the class. Maybe I shouldn't have used the sample? Could the visualizer been used? I was thinking of that, but did not know how to switch it on then.
5) The pre-activity instructions could have been clearer & the location should have been made known to the class before leaving the room.
6) I should have given more thoughts to how to deal with safety issues. Frankly, I was at a loss when Riyaz sprained his ankle & Pearl fainted.
Anyway, I know that I still have lots more to learn. Thanks guys for the fruitful learning experience! =)