# Week in Review – January 2012 Week 1

Good day everyone and a happy new year. This is the first edition of Week in Review for 2012. Here are my blog posts for this week.

- Top 20 Resource Materials Posts
- Year in Review – 2012
- 2011 GeoGebra Institute Activities
- Diagonals of a Parallelogram
- Proof that log 2 is an irrational number

**Updated GeoGebra Tutorials for GeoGebra 4.0**

- GeoGebra Tutorial 1 – Quadrilaterals and Midpoints
- GeoGebra Tutorial 2 – Constructing an Equilateral Triangle

If you like to follow or subscribe to Math and Multimedia, you can follow us on Facebook, Twitter, Google+ or subscribe to our RSS Feeds.