Category Archives: Uncategorized

#EdTechChat Social Network Graph

#EdTechChat Social Network Graph

Using the Twitter API and Plotly with Python, I created a visualization of a recent #EdTechChat on Twitter, held on December 14. If you aren’t familiar with graph theory, the dots in this visualization are referred to as nodes or vertices. They represent the Twitter users that participated in the chat. The line segments connecting them are called edges and represent a relationship between two Twitter users: one user follows the other.

#EdTechChat Community on Twitter

If you hover over a node, you’ll get information about it: the username, the number of followers and following (these counts refer only to the community of users that took part in this chat, so followers and “followees” that didn’t participate are excluded), and the betweenness centrality. That last number is a measure of the number of shortest paths in the graph that pass through a particular user. It is one possible way to measure the influence of a user within this community. Some of the most influential users in this community as measured by betweenness centrality include @teachintechgal, @KleinErin, @thomascmurray, and @EdSurge. Don’t miss out on the fact that this interactive plot allows you to zoom in and out as well on different regions of the graph.

I feel the methodology employed to generate this graph could be of interest to others. As such, I am publishing it to my GitHub account and have a couple more blog posts on this topic. In particular, I would love to find a school interested in using this method to give students an opportunity to do a graph theory exploration that would go beyond what they’d normally get from a textbook.


Cost of College Infographic

If you’re a current college student, this infographic about the rapid rise in the cost of college will come as no surprise to you. However, if you’re in your mid-30’s and have kids like me, you may be shocked to learn how rapidly the cost of tuition, housing, and books has risen in the last… Continue Reading

Chromecast for Teachers

Chromecast for Teachers

UPDATE: My Chromecast Review for Teachers has now been posted.   Even in the midst of getting ready for the big book release today, something caught my eye yesterday that I couldn’t pass up doing a post about. If you missed it, the Google Chromecast was announced yesterday. The Chromecast is a device that should… Continue Reading

Finding My Way Back

Friday’s post was the first on here in quite some time, and I’d like to offer a brief explanation. Essentially, I’ve felt forced to take some time away from my online adventures by a combination of poor health, a change of house, and a busy time at school. The health issue was a flurry of… Continue Reading

Nexus 7 Review and Book

Nexus 7 Review and Book

The last month has been absolutely crazy for me, with trips across the country and moving into a new home. However, as the start of the new school year arrives, I hope to pick up the pace again. In the next few weeks, I’m planning to update my calculator recommendations for students, a post on… Continue Reading

Microsoft PC President’s Day Deals

If you missed out on the some of the great deals on computers that were around at Christmas time, you can get in on the President’s Day deal through the Microsoft store this weekend. Starting today, they are offering $150 off their entire lineup of Windows PCs. This deal only goes through Monday, February 20th,… Continue Reading

Microsoft Store Black Friday Deals

Among the litany of Black Friday deals, Microsoft is kicking off the holidays with some pretty amazing special deals as well at the online Microsoft Store. All of these deals begin today (Thanksgiving) and most run through the end of the holiday weekend on November 28. They should appeal to teachers and students alike as… Continue Reading