Example implementation reports

The GeoGebra file featured in the gif above was created by past participant Joanne Overs

Within the scope of this course I have been confined to demonstration only, mainly due to issues relating to timing, topics currently under study, access to technology resources etc. In the past I have used it for student investigations such as graphing various linear or non-linear relationships, screen-grabbing and dumping into a Word file for upload to me via the school website.

I have not used it particularly extensively, yet. I have a bank of already made resources that with my new knowledge I can fully assess for suitability in my classroom, and I am adding to my own creations.

Today, I got to use my Quadratic Roots file and it worked really well in supporting the lesson on the features of quadratic functions. The students thought it was amazing when I moved the sliders to change the values of a, b and c and it was really effective for demonstrating things such as the axis of symmetry, intercepts and vertex. It was really powerful and worked much better than expected. The Pythagoras' file I used with Year 9 a week or two ago was not so successful. Too many numbers for that class... It was still useful, but not as much as I'd hoped. Maybe with a higher ability class. I have had a few 'light bulb' moments with GeoGebra in the past and will be paying a lot more attention to what works in that regard and what doesn't and with what classes/levels.

With regard to future use, I will be continuing to build up resources, organise them effectively, refer to them in my programs and reflect on their success regularly. I would like to make these sorts of things accessible to my students online. As a specific example, if I get a 2 Unit class for next year, I will be utilising GeoGebra extensively to try and build the conceptual understanding necessary for success. I'm thinking this could work through a flipped classroom type model, even if I don't use this approach exclusively (let me work up to that!). So far I have the file on the area under the curve as rectangles, and I have made a version of one I saw at a TPL that plots the gradient function to allow students the opportunity to 'figure out' the rules of differentiation before being told them. I have ideas for others and a number of existing files to review. If I don't get a 2 Unit class, my daughter is starting Prelim 2Unit next year so I'll try them out on her.

Thank you Richard for opening up GeoGebra. Unfortunately, I am now even more aware of the scope of this software and feel like there is still sooo much to learn! I am well and truly on my way though and feel like it is definitely having and impact on my classroom already, plus I'm much more confident about it all too. Thanks again!

Joanna Rankins, Chester Hill High School, November 2016

Students have been struggling to draw nets of solids. My idea was to create a file to help them see unfolding and for them to physically manipulate the unfolding. We have tried this by building our own cubes and other polyhedrons, however students could not really cope with the cutting and folding.

It is a class of nine (9) students who really struggle with all kinds of concepts and after seeing the file in actions they seem to be more open to trying to draw the nets of the solids. It helps if the can use the interactive board (in my case an Epson projector and EasyInteractive Tools. The boys really respond to Geogebra. Now that I have a “recipe” to draw and represent regular solids 2D, their nets and 3D it makes learning fun as we are able to quickly go through all the solids the boys suggest.

The boys explored solid, named them, determined number of faces, edges, vertices. They learnt a few basic formulas for area of squares, rectangles and triangles.

They were introduced to basic construction of a square versus drawing a square in Geogebra. I think they understand the difference now.

I introduced a file which had a square and the 3D window showing the solid. It is not that hard to learn how to use the 3D component of Geogebra, but it enhances the power of what you want to show. I used the unfolding of the cube to allow the boys to see the faces, count them and even had the counting the squares to determine the area. This could easily be made dynamic but I tried to keep the pictures not too busy.

The students could easily manipulate the figures using sliders. See screenshot. The students each get a printout.

Again, the files was used to demonstrate the difference between drawing and construction in Geogebra. Student enjoyed the use of the file as a demonstration of the relationship between the areas. I used colour to get students to see the relationship clearly. Even though these are simple examples of Geogebra file I am hoping that in the future our students learn to create files themselves.

Leon Petersen, Redfield College, August 2016

Tracy Scollay, Merewether High School, May 2016

Yousef Sherief, Kfar Aqab school, Palestine, September 2016

About halfway through the course I started using Geogebra as a demonstration tool in particular the topics of Quadratic functions and the discriminant. It was very useful in demonstrating the properties of the discriminant. What was best was how the class could instantly see results. I have most recently used Geogebra to demonstrate the gradient function to my year 11 mathematics students. With some students struggling with this concept I was able to demonstrate in Geogebra to get that "aha" moment. It felt great.!! This experience has inspired me to get more moments like this in my teaching. Most importantly the struggling students felt great as well as they had the sense of understanding the concept. It was unfortunate that I did not have the file ready at the beginning of the topic where it would have the had most impact. Those students who understood concept found the demonstration helpful in visualising the concept which strengthened their understanding.

What I like most about Geogebra is that it is instant especially when graphing functions and their properties. I plan is to use Geogebra more and more in my lessons to demonstrate properties and theorems. It is a wonderful tool to enhance and engage students in the learning process.

By understanding the fundamentals of a topic students are better prepared for problem solving tasks ahead. My aim now is to build files to assist with understanding for topics studied in 2U and 3U mathematics.

I thank you Richard for developing and delivering this course as self-passed. I look forward to other self-paced course.

Paul Fante, St Marys Senior High, August 2016

I definitely will continue to use Geogebra and involve the students in creating files of their own. It is a little disappointing that the Ipad version is not as comprehensive but probably quite adequate for the students. Thanks for a great course Richard.

Peter Currie, Arden Anglican School, March 2015

At this early stage, I am mostly referencing files that other people have created (of which there are thousands). I can't believe it has taken me this long to start to use GeoGebra.

Just this afternoon in introducing Parametrics, I was able to throw up x^2=12y on the whiteboard and right in front of the students' very eyes, plot a focus (0,3) and a directrix y=-3. The students were pretty impressed given that 99% of the time, I use a whiteboard marker. I then proceeded to draw all over the diagram, all over the board, with a marker. This sure beats a one metre ruler. Students seemed to get the idea of different values of a generating different shaped parabolas. The diagrams were certainly far neater than anything I could draw.

As a result of doing this Professional Development course, I am fully intending to use an adaptation of one of Richard's files to introduce Differential Calculus to my Year 11 class next week.

I am extremely thankful for Richard's input and support during my learning and for the terrific course he has developed. The old dog has learned a new trick.

Peter Molloy, Taylors College, August 2016

Here's another example of a simple-yet-very-effective GeoGebra file. GeoGebra is extremely powerful for junior and senior measurement units and, in fact, for many mathematical concepts involving formulas. The file below - upon which the gif was based - was created by past participant Peter Currie.

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