Safe cracker

摘要

Every Friday lunchtime, the criminal elements of Year 6 gather in my classroom intent on robbing me. This might not be the sort of behaviour you would expect at Wesley College and it would probably put some people off teaching altogether but it is something I actively encourage. These are some of our most enthusiastic and talented mathematicians, affectionately referred to as"The Usual Suspects" and they have come for the chance to be this week's Safe cracker.