Month: October 2010

GeoGebra Advanced Tutorial 2 – Embedding GeoGebra Applets in Blogger/Blogspot

GeoGebra, Software Tutorials

In the last advanced tutorial, we have learned how to export a GeoGebra worksheet to a Dynamic HTML. As we have observed, the GeoGebra worksheet is exported as a single page; therefore, we have very little control over it, unless, of course, we know how to code HTML or CSS. This also means that if we link the dynamic HTML to our blog or webpage, we will have to go to a new page to view it.

There are instances, however, that we do not want to open a new page; that is, we want to embed our GeoGebra applet in our web page or blog post. To do this, we will extract the GeoGebra HTML code (contains Javascript) and paste it in our blog post or web page.

In this tutorial, we will use Blogger as a sample blog to embed a worksheet since Blogger allows Javascript embedding. Note that there are websites or applications that do not allow Javascript embedding, so you have to consult with your technical support, in case your GeoGebra worksheet didn’t show up after you embedded it.

Instructions in Embedding

In this post, we will assume that you have already a GeoGebra worksheet to embed. If you just want to follow this tutorial, and you do not have a GeoGebra worksheet, you can download a sample GeoGebra worksheet here and follow the instructions below.

Steps in Embedding GeoGebra to a Blogger/Blogspot Post

  1. Open your GeoGebra file.
  2. Resize the GeoGebra window so that it will fit the place where you will embed it. Note that the size of the GeoGebra window in a GeoGebra worksheet will also be the size of the applet after embedding.
  3. Select File>Export>Dynamic Worksheet as Webpage(html) from the menu bar to display the Export dialog box.
  4. In the Export dialog box , select the Advanced tab, and then select Clipboard: HTML from the Files section.
  5. Click the Clipboard button to copy the HTML code. » Read more
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What is Wolfram Alpha and why is it so special?

Teaching Tools, Web 2.0 Technology

When you type a word or a phrase in a search engine, the output that will be shown to you a list of websites or documents related to your search word or phrase. For example, typing “speed of light” in the Google search engine would return the list similar in the image shown below.

Wolfram Alpha, on the other hand, returns answers to search phrases or questions instead of a list of related documents or web pages. Searching “speed of light” in the Wolfram Alpha search engine returns the figure below. » Read more

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Matchsticks, Linear Relations, and Multiple Representations

High School Algebra, High School Mathematics

Introduction

We have mentioned the different types of functions in the Introductions to Functions post.  In this post, we are going to learn about linear function and its  characteristics.

To start, let us examine the problem below taken from the TIMSS 2003 released items given to Grade 10 students in more than 40 countries all over the world.

Matchsticks are arranged as shown in the figures.

If the pattern is continued, how many matchsticks would be used to make figure 10.

A. 30                      B. 33                      C. 36                      D. 39                      E. 42

The problem is too easy that even a first grade pupil would be able to answer it given enough time. Smart students would be able to easily see patterns. For example, they can relate the number of squares to the number of matchsticks.  If they cannot find a pattern, the last resort would be by brute force; that is, by manually drawing the tenth figure. » Read more

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