Hands on Geometry


Geometry was always one of my favourite subject areas.  I guess I just like the whole concept of visualization and being able to manipulate shapes.

One of the universal tools for geometry exploration and construction is the Geoboard.  I used it quite a bit teaching Grade 9 mathematics.  It was a wonderful tool to even the playing field for students coming from Grade 8 and having varying levels of geometry understanding.  It was also a reminder that, since banning javelin throwing, it was one of the few times that we intentionally arm students with weapons.  You’ve just got to know that with 14 year olds, the first few days with the Geoboards and real elastic bands was interesting.

Time moves on and it’s a natural that this wonderful technique has been extended to the digital world.  Same stretching concepts, coloured and unbreakable bands, and a kinder, gentler, less painful implementation.  With school computers meshed with Bring Your Own Device programs, finding a universal solution is a desirable move.

The Math Learning Centre provides one that’s both web and app based.

There are lots of options available depending upon your needs and screen size.

Of course, measurement dealing with area and perimeter leap to mind.  But, don’t limit yourself to just that.  With a little imagination, this device lends itself to all kinds of ideas.  Check out these Pinterest resources from Diane Fangmeyer, The Remade Mama and Inesa A as starting points.  Of course, Pinterest is the perfect place to pin these ideas.

I remember one particularly neat idea we used with the Grade 9s.  Standing in downtown Windsor, one of them had taken a picture of the Detroit skyline and the students replicated it in class with a series of Geoboards.  (We had small ones so had to improvise).  We used a picture of the Renaissance Centre and the students painstakingly reproduced it on the Geoboards.  Of course, it had to be to scale.  Imagine the math.  It was a great activity.

Doing it today, the mechanics would be completely different.  We’d be doing it on computers or devices.

The Math Learning Centre makes its Geoboard available for free:

They’re well worth a look and evaluation for your classroom.

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OTR Links 06/01/2015


Posted from Diigo. The rest of my favorite links are here.