Notes from the IWB Network Meeting – Weds 4th July 2012

Notes from the IWB Network Meeting – Weds 4^th July 2012

Present:

Kathryn, Janet, Louise, Simon, Rachel (Cottenham), Glenn (St Peters), Mike (Linton), Paul (Longsands), Sarah (Ely), Fran, Alissa (Parkside), Mark (Comberton)

Thanks to Rachel for hosting the meeting.

The focus of the session was Algebra.

Mark:

A photo-finish from the Athens Olympics 100m.  Asking what this shows (without revealing the source) provides some interesting discussion:

How do we know it is a sprint?

What do the vertical lines show?

How do we know who won?

How do we know, from this picture, who came second?  (we don’t)

How many runners are there?

Up to this point we had only used it as an image, so we discussed how to use the board to enhance the discussion. 

                Use the camera tool to take a picture of one of the runners and move it to help estimate how far behind the final runner is.

                Demonstrate that the width of the lanes can’t be used to help decide the margin of victory.

Rachel:

Rachel shared an nrich problem (http://nrich.maths.org/7283) that works very well when the pieces are created as separate rectangles on the IWB because they can be moved around to show the different possibilities.

The questions posed by nrich (and others) were typed on a slide for pupils to use.

Sarah:

Sarah uses geometrical diagrams to allow pupils to work on algebraic expressions.  For example, start with a square with area x and a quarter circle (radius the same as the side of the square) with area y.  Then make other diagrams.  Eg the area of a semi-circle is 2y, etc.

We explored how to make the fragment that has area (x – y) made by subtracting the quarter circle from the square.

Alissa:

Alissa shared a file that involved balancing animal pictures as a way of introducing and exploring simultaneous equations.  This worked very well.

Glenn:

Glenn showed a way of helping pupils to understand what is going on when trial and improvement is carried out.  He gave an example using n² + n = 25, showing a numberline from 0 to 10 and removing the sections that clearly didn’t work until he was left with the 4-to-5 section.

Then he had a new numberline that ran from 4 to 5 in tenths and removed sections of this.

We discussed whether the zoom function on SMART could be helpful.

Mike:

Mike described a way of helping pupils not to be misled into trying to simplify further an expression that is already in its simplest form.  For example, to show that 3x+2 is not identical to 5x, Mike draws a line that he labels as being of length 1, another line (of a different, non-integer length) that he labels x and then clones these and makes a line to demonstrate the length 3x+2 and another, below it, to demonstrate 5x.  The lines are different.

An extension to this can show that x² + 3x is not the same as 4x²

Rachel:

Using photographs of celebrities Rach used the camera tool to take a picture of one half, copied and reflected it and used this to test the idea that symmetrical faces are considered to be more attractive.

She then allowed pupils to use photos of themselves …

Next year:

This was the final meeting for this academic year.

Next year we will meet on four occasions as usual.  Cottenham, Parkside and Comberton all indicated a willingness to host a meeting.

Thanks to all for their input during the year.

Notes from the meeting on Weds 25th April 2012

Notes from the IWB Network Meeting – Weds 25^th April 2012

Present:

Glenn (St Peters), Mike (Linton), Paul (Longsands), Rachel (Cottenham), Sarah (Ely), Simon (King Edwards), Fran (Parkside), Mark (Comberton)

Thanks to Sarah for hosting the meeting (and for providing cake!).

The focus of the session was Geometry.

Mark:

Two features of the SMART notebook can be used together to make tetrominoes and then pentominoes.  One is ‘infinite clone’ – start with a single square and set up infinite clone (right click the square, or tap the square to select and then click the arrow in the top right-hand corner).  This allows lots of squares to be dragged from this one.  The other is ‘alignment’.  In some versions of the notebook this is found under ‘View’, in others under ‘Format’.   Choose ‘show guides for active objects’ and ‘snap objects to guides’.  This allows the squares to be joined together easily.

Rotations are very basic on the notebook software.  If you want a shape to rotate around a particular point, because the software will only let it rotate around the centre of the object you need to create a larger object that has the point to be rotated around at the centre of the object.  An easy way to do this is to copy the shape, put it the far side of the centre of rotation from the shape, colour it white, and then group it to the original shape.  The combine object now rotates as desired.  This is only a work-round, though, and must be set up in advance!

Vectors work brilliantly on the IWB.  Set up a couple of vectors, then put them on infinite clone and demonstrate the rules of vectors by dragging multiple copies. 

Fran:

Cabri-3D is cool!  It is worth getting for sixth formers to use and great to use for younger pupils, but the cost may be prohibitive if it will just be used with KS3 and KS4.

Use ActivInspire Promethean software for rotations!  It will allow you to set up a centre of rotation and to rotate a shape around that point.  The centre of rotation can then be moved and the shape rotated again.  This is particularly good for loci work with, for example, a rolling square.

Rachel:

The centre of rotation can also show where the line of reflection symmetry goes.  This is very good when reflecting pictures.

Fran:

Make a button and add an action, like reflect, to make this quicker to access.

There are lots of great effects that are possible on ActivInspire.

Glenn:

Cut corners off a triangle and rearrange to show that the angles add to 180 degrees.

Do this by setting it up in advance with a copy of the angle on top of each vertex – drag these and rotate as necessary.

Mark:

Can use the camera tool to take a picture of these.  Beware – on SMART to get the image from the camera tool showing at the same size you need to set it to be at 100% and not at the default “page width”.  If you take a picture using the rectangle version of the camera you can then right-click and ‘set transparency’, allowing you to make the border parts transparent so they will overlap nicely.

Fran:

The transparency tool will also allow shapes with holes in to be created – this has lots of uses.

Taking a picture and rearranging is also useful for things like showing the area of a trapezium.

Sarah:

NGfL Cymru has lots of excellent materials.  http://www.ngfl-cymru.org.uk/

Next Meeting:

This will take place on Weds 4^th July at Cottenham Village College, from 4:30 – 6pm (thanks to Rachel for hosting).  

The focus will be on Handling Data (as originally advertised) or on Algebra (from the session cancelled earlier in the year).

At the start of the session we will ask participants to share their problems/requests/demands.  This might be a lesson idea and a question about how the IWB can be used effectively as part of the lesson.  The group will then work on solving that particular problem during the session.