Some ideas for taking the register:

01 Spell name or surname
02 Spell name or surname in reverse
03 The class say their first names in alphabetical order. 
04 The class say their names in reverse alphabetical order. 
Communication needed for 03 and 04
05 Each student says an animal (or any category) that starts with the first letter of their first name. if a student gets stuck the class help.
06 Complete a sentence related to current learning: I have never ____
07 What did you do at the weekend? Answer in exactly 6 words.