The second quarter of the year has ended — time flies fast indeed. Below are **Math and Multimedia**‘s most popular posts in the second quarter of 2012.

**Mathematics and Mathematics Teaching**

- 7 Extraordinary Mathematicians You Should Know About
- Mathematics and Perspective
- Proof of the Half-Angle Formula
- Wedding Guests and Circular Permutations
- Proof of the Sum of Square Numbers
- Counting the Number of Squares in a Chessboard
- 10 Reasons Why Mathematics Teachers Should Blog
- Proof of the Sum of Natural Numbers
- Why Every Proof that 0.999..=1 is Wrong (April Fools)
- Visualizing the Difference of Two Squares
- Mathematical Proofs without Words: What are they?
- A Simple Proof of the Arithmetic Mean- Geometric Mean Inequality

**Multimedia Resources and Freebies**

- 500 Math Ebooks – Downloadable and Free
- Microsoft Mathematics Tutorial 3 – Equations and Inequalities
- Microsoft Mathematics Tutorial 1 – The User Interface
- Microsoft Mathematics Tutorial 2 – Performing Basic Computations
- FooPlot: An Easy Online Graphing Tool
- Latex in Blogger: Another Alternative
- Google Drive: 5 GB of Free Online Storage
- 39 Gorgeous Data Visualization Software
- Using Latex in Gmail
- Newton’s Notebooks, now online
- GeoGebra introduces Chrome App
- Embedding Wolfram Demonstrations

You may also want to browse the following:

- 2012 Quarter 1 in Review.
- Month in Review – April 2012
- Month in Review – May 2012
- Month in Review – June 2012
- List of Posts by Category
- Complete List of Posts by Month

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Quarter in Review – The Most Popular Posts: The second quarter of the year has ended — time flies fast indeed. B… http://t.co/0igw7yJi