It’s easy to find interactive graphing calculators websites, but finding a free, easy to use graphing calculator applet that’s not buggy is more of a challenge. One of the best is hosted at Utah State University’s NLVM site, the National Library of Virtual Manipulatives. If you’re not familiar with it, NLVM is an extensive collection of interactive applets for students and teachers. You’ll find not shortage of interesting puzzles and games there, but this time we wanted to highlight their “grapher” applet.

What sets apart the NLVM grapher is its simple to use, yet powerful interface. An easy to use menu at the top of the screen allows for fractions, exponents, square roots, and absolute values, and they can all be inputted just as they appear in a textbook. There’s very little clutter on the screen to intimidate users.

There are surprisingly powerful options for a Java based calculator. Of course, there is a simple trace feature, which utilizes a slider bar. There are three additional tabs for users to choose from, parameters, window, and functions.

Parameters allows the user to insert up to three parameters into the equation that can be manipulated with a slider bar. If you are interested in examining translations, this is a very powerful feature since the graph adjusts in real time.

Not surprisingly, the window tab give the user the option to adjust the graph view. Fortunately, it is also possible to zoom by simply using the mouse to select a region to view.

The functions tab gives the user the ability to input up to three functions. One of the really nice features here is that composite functions are supported (although inverse functions are not). Other advanced features offer the ability to choose each functions color and restrict domains.

The applet doesn’t contain all the functionality of a high end graphing calculator handheld, but that’s not really the point. Whether you’re a student using it to try out graphing for the first time or a teacher incorporating it into your lesson, it’s a simple and reliable solution. NLVM’s grapher is one of the best online graphing calculators available today.

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www.techpoweredmath.com for my new review comparing the TI-89 and the TI-Nspire CX CAS. Tech Powered Math reviews the Texas Instruments calculators, TI-89 and TI-Nspire series. For more, subscribe and visit www.techpoweredmath.com Music Take the Lead, Kevin MacLeod (incompetech.com) Licensed under Creative Commons “Attribution 3.0″ creativecommons.org

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Education has changed significantly in the last twenty years. One of the main reasons education has undergone so many changes is because of technological development. In 1990, computers and other forms of technology served a minimal role in the classroom. Today, many if not most college students attend class with a laptop. I am writing about some of the biggest advantages technology gave to education.

Technology has made research much easier. Before online Encyclopedias, Google Scholar, JSTOR, and other online research tools were available, students were forced to spend numerous hours in the library. With the new tools, students can conduct research faster in the comfort of their homes. With Google and other search engines, students can find relevant information faster and more efficiently. Also, there is no more need for intensive memorization as information is more readily available.

New also technology allows for a faster, more efficient, and more interactive classroom experience. With Powerpoint presentations and projectors, there is no need for blackboards and whiteboards. With clickers, students can take quizzes during the classroom.

These developments also help improve tutoring services. Online tutoring programs are becoming available. One-on-one in-home tutoring programs are also being aided these developments. Tutors can bring laptops to sessions allowing them to look up information, and show examples to the student more easily.

Wi-fi technology allows students to study in more comfort and a more ergonomic setting.

New mathematical software such as Maple and Mathematica allows students to make a computer algebra computations more easily. Software like Matlab and Scilab allows students to make numerical computations more easily. There is no more need for a line rule. Advanced Texas Instrument and Casio calculators allow students to solve equations and produce graphs. Online software such as Webassign allows students to submit mathematics assignments online with instant feedback.

The internet allows students to read books and educational supplements at home. There is no need to go to a bookstore or library. Since many of these sources are open source or funded by advertising, students can access these materials for free. Wikipedia, Wikibooks are good examples. Students can learn more without leaving their house.

College applications and job applications can now be complete online. Students can deliver important paperwork to universities and employers at a much faster rate.

Online education allows more students to get an education. Handicapped students, students that have to travel a lot, and students with jobs can now complete their degrees wherever they go with a flexible schedule and often at their own pace. Due to its lower costs, online education also benefits lower-income students.

Technological development allowed the creation of new IT jobs and improved economic development in general.

Not all effects of technology on education are positive. Technology also allows students to cheat more easily. However, new technology allows instructors to detect plagiarism. Technological developments can also discourage critical thinking since answers are more readily available. Technology also encourages students to spend their time doing other activities such as playing video games and participating in social networking.

Overall, technological development in the 1990s and 2000s appears to be beneficial to education. Currently, technology improvement follows Moore’s law which states that computers become twice as efficient approximately every two years. Today, one can purchase a well performing personal computer (without a monitor, software, and other accessories) for as low as $123.99. Recently, I have not spent over $250 on a desktop computer and it allowed me to do very advanced computations like high-sample Monte Carlo algorithms. If the trend continues, students all over the world will be able to afford desktops and laptops contributing to a better global education.

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