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Physics Textbook 2.0

Updated: March 25, 2009February 27, 2009Filed under: Education1 Comment
Online Physics Flexbook
Online Physics Flexbook (click to expand)

Imagine a textbook that you can download, is open-source, is up to date with the latest information and you can comment on? Well, it exists. It’s called a “Flexbook” and today the state of Virginia released a Physics Flexbook online for a 2 week public review.

The 11 chapter online textbook contains a chapter devoted to teaching physics with modeling and simulation. It uses three Learning Labs developed with STELLA and allows students to interact with them using the free isee Player.

We got involved with the Physics Flexbook project last fall when we met the director of the program, Jim Batterson, at the MODSIM Conference in Virginia. He told us about a “wiki-style” online physics textbook that allowed teachers and scientists to collaboratively develop the content. The content would be free for anyone to use, share and adapt and contain the latest scientific information.

We thought this sounded like a fantastic idea and pledged our support for a chapter of the book that incorporates modeling and simulation to teach physics. Our friend Mark Clemente wrote the chapter and we setup a web page to host the STELLA models and allow easy access to the isee Player to interact with the models.

Earlier this week, Joanne and I were back in Virginia for the VSTE 2009 Conference (Virginia Society for Technology in Education). We attended Jim Batterson’s session on the Physics Flexbook where we got the full story on the inception and development of Virginia’s first open-source, online textbook. The session was very inspiring.

Jim Batterson is a retired NASA Engineer, former physics teacher and school board member. While Jim was at NASA he was chosen to direct a review of Virginia’s Standards of Learning (SOL) in science education. The goal was to come up with recommendations for the state on how to better meet the needs of the 21st century workforce.

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Education
  • Creative Commons
  • MODSIM
  • Open Source
  • Physics
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Setting Number of Points in a Graphical Function

Updated: March 25, 2009February 25, 2009Filed under: Modeling TipsComment

One of the questions I am sometimes asked is, “If I need a specific x-value to appear in my graphical function, how do I determine the number of points required to include that exact point?”  This arises because in a graphical function, the x­-axis is divided into fixed intervals; the user is only allowed to specify x-min, x-max, and the number of data points.  [If you really need a graphical function with arbitrary (x, y) points, use the LOOKUPXY() built-in function available in version 9.1.2.]

For the following discussion, the range on the x-axis will be needed:

range = x_max – x_min

In all of the examples below, x_min = 3.000 and x_max = 7.000, so the range = 7 – 3 = 4.

For integer values, here is a simple formula that always works:

# of data points = range + 1                                                                                  (1)

For example (using the range above), if the number 6 (an integer) must appear as a point on the x-axis, 4 + 1 = 5 points will be needed.  This divides the ­x-axis into the points 3.0, 4.0, 5.0, 6.0, and 7.0.

Fractional values, however, are more difficult.  In general, if you can isolate the fractional part (and this evenly divides the range), the maximum number of points needed is given by this formula:


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Modeling Tips
  • data
  • graphical function
  • iThink/STELLA
  • software
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Welcome to the isee Blog

Updated: December 15, 2009February 18, 2009Filed under: News & Announcements21 Comments

The isee systems BlogWelcome to the isee systems blog, “Making Connections”.  We hope you find it a practical resource for learning more about Systems Thinking, applying it to real-world situations, and using our software and training materials.

While we don’t have a set schedule, we post to the blog often. You can automatically get the updates by subscribing  via email  or using a news reader such as Google Reader, NewsGator or FeedDemon.

Most importantly, we want to hear from you. Please give us your feedback, post your comments, and keep us in the loop on what you’re doing and thinking!

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