Reva Narasimhan

Schedule Virtual Meetings through CourseSites

If you are looking to have a synchronous online meeting with your students, you can easily accomplish that with CourseSites by Blackboard. It is a full featured version of Blackboard and allows free hosting of up to 5 courses. I use it to create a “meetings” course and then use the Live Meetings tool. It’s a full featured online meeting… Read more →

Dynamic Numbers with Sketchpad

Elementary and middle school students can use Sketchpad activities to learn about relationships between numbers and early concepts of algebra. The following video shows an interesting activity which asks students to figure out the missing values of the shapes by using just their inequality relationships. The downloadable Sketchpad activity as well as related information can be found at: Sketchpad… Read more →

Math Equations in Google Sites

Math Equations in Google Sites

I use Google Sites for most of my course related materials, since it is part of university’s Google Mail account. MathJax – a system for writing math on the web – does not work with Google Sites, since MathJax uses Javascript.  After some time googling this issue, I found that Google has its own way to enter math. For example,… Read more →

Google 3-D Grapher

Google 3-D Grapher

Just type in x^2-y^2 into Google’s search box and you get the saddle figure – and you can move it around as well!  With these types of  ready- to -go aids for graphing, anyone can incorporate serious graphics into teaching and learning math. Click on the image  to see a “live” version of the surface  \(z=x^2-y^2\).

Web based Excel

It is now possible to run a limited version of Excel completely on the web. Click on the post title to see an Excel web app that I created. It’s interactive – you can change numbers and the results will change. More Excel material can be found at my website,

MOOCs as course supplements

I’m teaching an Intro to Proofs course this Fall, and am planning to have students also sign up  online for a course called Introduction to Mathematical thinking, a free massively open online course (MOOC) offered by  coursera . The course will be delivered by Stanford professor Keith Devlin, and looking at the online course outline, it looks like a perfect supplement… Read more →

Interactive math demonstrations from Wolfram

The following is one of literally thousands of interactive demonstrations in the Wolfram Demonstrations web site. You will need the free CDF player to run the demonstration. A small collection of these can be posted on a class web site for students to explore and then answer questions interactively, perhaps using Google forms, or as a hand-in assignment. Formulating good… Read more →

Google and other online graphers

You can enter an expression like sin(x),cos(x) into the Google search box, and it will give you a graph that you can zoom in on and trace! Pretty simple – nothing to download! Can ditch the graphing calculator for just plain graphing. You can also check out the Desmos online calculator, which has many features. I  found out about it… Read more →