A blog about teaching and learning in a maths classroom.

Archives → Ratio

Double Strength Cordial and Ratio

Monday, 17 January 2011 ·

When introducing the topic of ‘ratio’, I use the mixing of cordial as an illustration that most kids get.
The idea of using 1 part of cordial to 4 parts of water makes sense to them – and they get the idea of equivalence when you mix the cordial in a different sized container (I use the examples of using cups to fill a bottle for a picnic, and using buckets to mix a big batch for a party).

Theatrical Aspect Ratio

Wednesday, 14 January 2009 ·

Recently Dan Meyer posted his thoughts on the ideal maths textbook, which would actually be a digital archive of very interesting mathematical media.  This is a great idea, and whilst I don’t have a projector in my classroom yet (although fingers-crossed), it would be something that I would buy/subscribe to.  Anyway, there was a challenge in this for me: being mindful of the media I consume and the world around me to collect digital bits and pieces that might help explain a mathematical concept (I commented on Dan’s blog that I missed the opportunity to take a picture of 3m³ of dirt I had delivered).  The second, to my mind harder, challenge is to take that item and make a meaningful and engaging connection with a concept being taught in class.

New  Subscribe to the …

email newsletter

Get updates…

Twitter   Facebook   Pinterest


Simon Job — eleventh year of teaching maths in a public high school in Western Sydney, Australia.
MathsClass is about teaching and learning in a maths classroom. more→


by date

by category



updates via @mathslinks

Recently read/found.

View All | RSS