Build a Better Pie Chart: Two Online Graphing Tools
Whether you’re an AP Statistics teacher or just trying to get your fourth graders ready for their state math assessment, most teachers will acknowledge that it is important for students to understand how to create and read graphs and charts. Beyond passing tests, I feel this is an indispensible information literacy skill for students in the 21st Century who are constantly bombarded with data presented in diverse – and sometimes misleading – forms. To be able to understand and critique these presentations of data, students need to not only see and discuss them; they must create them. Again and again. Until they see graphs and charts as tools for understanding and presenting complex data.
Of course, any teacher who has tried to help students graph even the simplest data using Microsoft Excel will tell you that this is no easy task. Even adults who have spent years making charts and graphs in Excel’s wizard (read: me) still struggle to create them at times. I’ve been on the lookout for tools that would provide a simpler and/or more powerful solution than Excel. Recently, my quest brought me to Swivel and NCES Create-A-Graph.
Swivel is Web 2.0 to the core. Users can upload data sets and then choose from a number of formats for presenting the data in visual form. The data they upload and the graph(s) they create become accessible to all visitors to the site. Additionally, students can view the data and graphs uploaded by others.
I found Swivel difficult to use. To upload data, it must first be saved as an Excel spreadsheet or CSV file. While there is an option to type data directly into the application, it must be formatted by hand in a single large text entry box. Once the data have been uploaded, the user must tell Swivel which columns to use and what format the data are in (currency, dates, etc.) Surprisingly, while I could view data and graphs created by other users, I couldn’t find a way to make my own graphs based on another user’s data. On the plus side, you are required to cite a source for your data when you upload it, a nice reminder for students.
Once the data have been uploaded, Swivel creates a basic line graph of it. You can then edit the graph to change to another form (pie chart, bar chart, etc.) or to change its appearance. Of course, like any web 2.0 application, you tag your creation to help others find it. There are options to permalink your graph or to embed it in a web page or blog.
Swivel is, potentially, a very powerful tool for creating visual representations of data. Unfortunately, it is probably too difficult to use for most students who are looking to put together a quick graph or chart. In Swivel’s defense, it was still in Beta at the time of this writing. And while it is somewhat limited as a graph creation tool for the K-12 set, it could be an excellent place for students learning about graphs or doing research to find a treasure trove of examples based on real life data.
Did you know that the National Center for Education Statistics has a “Kids Zone” and that it’s coolest tool helps students create their own graphs? Unlike Swivel, Create-A-Graph is geared squarely towards K-12 users and will be especially useful to students in elementary classrooms. Its feature set is far more limited than Swivel’s and none of the sharing/tagging options are there but for a teacher looking for a simple but effective way to help students create appealing and accurate graphs of their data, it is just the ticket.
Create-A-Graph’s interface features five tabs which students work through as they develop their graph: Design, Data, Labels, Preview, Print/Save. In the design phase, they select a format (line, bar, pie, area, X-Y) and colors for their graph. In the data tab, they describe and then key in their data set, specifying the color and thickness of each line or region as they go. There is no option to upload data entered into a spreadsheet or database. They then add labels, preview their creation, and then output it in one of three formats: print, download (as a JPG or PDF file), or e-mail. Unfortunately, you cannot save a graph and then come back to it later. A graph must be created start-to-finish in a single session.
Create-A-Graph is simple enough for a third grader to master and powerful enough for the classroom teacher who wants to show parents the class’s progress on spelling quizzes over the course of the year. It’s a real gem for teachers who want students to put down their rulers and graph paper and start putting the computer to work in presenting their data.
Together, Swivel and Create-A-Graph fill the yawning void between Tom Snyder’s Graph Club (which is a wonderful tool to introduce lower primary grades to graphing) and Excel. If you want simple and friendly, try Create-A-Graph; the more adventurous and social among us might want to give Swivel a go. Happy graphing!
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Er, make that seven (sorry Pluto). I’ve been wondering lately if/when Google would launch a “Google Mars” similar to 