Odd and Even Apex

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

Go outside into the playground. You are the designer of a playground. You will need to work out the whole{...}

https://www.scootle.edu.au/ec/viewing/L869/index.html# All wishball games can be found under the skills practise. https://fusecontent.education.vic.gov.au/5801fadc-dba8-4df1-87f6-4d77506498f7/p/Maths_template_place_value/index2.html   Use the ‘Wishball’ series of digital resources{...}