Home > Articles > Open Source > Linux/UNIX/Open Source Operating Systems

  • Print
  • + Share This
This chapter is from the book


There are many applications available for your Ubuntu and Edubuntu desktop in addition to those specified in the following two sections. For further information on installing extra applications, please refer to Chapter 4. If you are using Kubuntu, then it is best to refer to Chapter 8.

Standard Applications

The standard applications are now provided by the Ubuntu, Kubuntu, or Gobuntu desktop, with the ability to install the educational packages from Edubuntu either by the add-on CD or via the Synaptic Package Manager. Let’s take a few moments to discuss some of the prominent packages installed with Ubuntu. To get a breakdown of the standard applications available in the other projects, please review their respective chapters.

Educational Applications

Let’s take a walk through the Edubuntu Educational menu, found at Applications > Education. You will find a brief summary for all applications here, as well as more detailed explanations and screenshots of some of the more advanced packages.

GCompris Administration

This is the administration tool for the GCompris set of tools, which is described a little later. Using this tool, you can create separate profiles for different users of GCompris and enable or disable the list of available activities.


Kalzium presents the pinnacle of periodic table exploration for users of any ages. In its simplest form, it provides a quick and easy reference to the periodic table. Kalzium includes 105 of the naturally occurring elements, many of which are accompanied by sample pictures. If the user hovers the mouse pointer over an element symbol in the periodic table, a balloon appears showing the selected element’s name, atomic number, and mass (Figure 9-1).

For more advanced users, Kalzium provides a fascinating way to explore the periodic table. Using the left-hand panel, users have access to the time-line, boiling point, and melting point sliders. When users move these sliders, the elements on the periodic table change color according to their dates of discovery, boiling points, or melting points, respectively. Users can then start to see patterns emerging in the periodic table right in front of their eyes.

As well as presenting the basic information, Kalzium provides very advanced statistics on each of the 105 elements present.


Kanagram is a simple package that messes up the letters of a word to create an anagram that children must then descramble. The package comes with hints, a cheat feature that reveals the word, and built-in word lists, which can be extended.


KBruch is a math program to help students practice the use of fractions. It comes with four distinct modes of play.

  • Fraction Task: In this exercise, the user is given a fraction sum that must be solved by adding the numerator and denominator. The difficulty of the sum can be changed by the user, who has control over the number of fractions to use, the maximum size of the main denominator, and the mathematical operations to use, such as addition, subtraction, multiplication, and division.
  • Comparison: This exercise is designed to test the user’s understanding of fraction sizes by making him or her compare two given fractions.
  • Conversion: The Conversion mode tests the user’s skills at taking a given number and converting it into a fraction.
  • Factorization: Factorization tests the user in calculating the factors of a given number. Factorization is a key skill in using and manipulating fractions.


KEduca is a system designed to make it easy for teachers to create and administer tests. Quizzes can take the form of multiple-choice questions and can be further enhanced with images, multiple answers, and varying scores depending on the answer given and time limits. Teachers can also download more example exercises from the KEduca main server. This is the game portion of the package.


This program allows easy creation and editing of KEduca tests.


This modern version of a classic game helps children learn to spell and recognize letter patterns in words. KHangman shows a blank base to start; as the user chooses letters, they are entered into the word if correct or placed on the tries list if incorrect, in which case the hangman begins to grow. KHangman comes with three built-in word lists, but these can be extended easily.


For people wishing to learn about geometrical construction in mathematics, Kig is a must. It is an extremely powerful package but very simple to use. Kig allows users to create complex geometrical abstractions from over thirty simple tools, such as points, parallel and perpendicular lines, arcs, bisectors, circles, and hyperbola (Figure 9-2). When creating abstractions, Kig uses other lines and points already on the diagram to lock onto, making it easy to achieve high precision.

Kig also has some testing tools included. Once a geometrical diagram has been drawn, it is often required to prove a concept by showing that two lines are indeed parallel or perpendicular. Kig offers these tools and more in an easy-to-use manner. Just clicking on the tool prompts the user to choose the item to test against. Then, each time the user hovers over another item while moving the cursor around, Kig will pop up with a message to tell whether or not it satisfies the test case.


KmPlot is a mathematical function–graphing program for Edubuntu. The package has a powerful expression parser built in and can plot different functions simultaneously and combine their function terms to build more complex mathematical functions. KmPlot also supports functions with parameters and functions in polar coordinates. KmPlot can create graphs to a very high precision, making it excellent for teaching purposes.


KPercentage is a simple math application designed to test users on percentages. It has three modes of play, giving variability in the type of problem posed. In addition, KPercentage has a random mode to test all scenarios.


With information on over 130,000 stars and 13,000 deep sky objects, KStars is one powerful package when it comes to space exploration. The main view in KStars follows the time and date to provide the user with a constantly updating view of the night sky. Constellations are highlighted and star clusters marked for clarity (Figure 9-3).

KStars has a simplistic user interface, which makes it ideal for amateurs all the way up to astronomy experts. Celestial objects can be right-clicked for more information and can then be tracked and examined in even more detail.

In addition to the huge celestial object database, there are some other fantastic features in KStars. The Calculator, for example, allows the user to compute coordinates and other figures for a variety of objects and scenarios. KStars can even be hooked up to a telescope to allow real-time tracking of what the screen shows.

The What’s Up Tonight? tool provides an overview of what objects will be visible in the sky on that particular night, with the ability to then center on an object and track it in real time. The Altitude vs. Time feature allows users to see how the altitude of a celestial object varies with time during the day. With a built-in scripting language, KStars is the most comprehensive astronomical observation application in the open source community.


In this day and age, typing is an everyday occurrence for most people. KTouch is a tutor that gives help and support to those wishing to learn the art of touch typing. With fifteen levels and automatic level progression, KTouch is a fairly advanced tutor program, offering statistics and alternative language options, too.


KTurtle is a Logo programming language interpreter for Edubuntu. The Logo programming language is very easy to learn, and thus young children can use it. A unique quality of Logo is that the commands or instructions can be translated, so the user can program in his or her native language. This makes Logo ideal for teaching children the basics of programming, mathematics, and geometry. One of the reasons many children warm to Logo is that the programmable icon is a small turtle, which can be moved around the screen with simple commands and can be programmed to draw objects (Figure 9-4).

By typing in commands such as turnleft 90, forward 4, children are using a language native to themselves while also learning procedural logic. KTurtle can even handle simple subroutines, so it’s easy to extend the programming onward and upward.


Kverbos is a tool designed to aid users in learning Spanish verbs. The program suggests a verb and a tense, and the user must then fill in the blanks. The list of verbs can be altered to allow users to tailor it to suit their needs.


KVocTrain is a simple tool designed to enhance a user’s vocabulary in a foreign language. Its interface is similar to a spreadsheet and comes with a link to a large array of sample files.

Others Not on the Education Menu

Some educational applications are not located in the Education menu. Here are brief descriptions of two of them.

  • Tux Paint: Applications > Graphics > Tux Paint

    Tux Paint is a drawing package for younger children. Although geared toward a younger audience, Tux Paint still packs in some of the more advanced features of drawing packages and can draw shapes, paint with different brushes, use a stamp, and add text to the image. The Magic feature allows many of the more advanced tools normally found in full-fledged photo editors to be used, such as smudge, blur, negative, tint, and many more. There is also the facility to save as well as print.

  • GCompris: Applications > Games > GCompris

    GCompris is a set of small educational activities aimed at children between two and ten years old and is translated into over forty languages. Some of the activities are game oriented and at the same time educational. Among the activities, there are tasks to educate children in computer use, algebra, science, geography, reading, and more. More than eighty activities are available in the latest release. GCompris won a Free Software Award that took place in France in 2004.

  • + Share This
  • 🔖 Save To Your Account