5/6 Angles

Introduce the problem to students: How many handshakes would there be if everyone in the classroom shook hands exactly once?{...}

  http://nrich.maths.org/2004 Trebling Age 7 to 11 Challenge Level Can you replace the letters with numbers? Is there only one{...}

Go online with a partner or on your own.    Pick two retail companies (e.g. Cotton On, JBHifi, Smiggle) and{...}