Group 1 : Every student picks a number card or wooden or plastic number in figure from 11 to 20. They show their numbers and then make a line in an order from 11 to 20.

Group 2 : Every student picks a number card in words. They show their cards and make a line from eleven to twenty. Finally. group-2 members choose their respective numbers from group-1 and make pairs. (Continue ............)