Geometry is everywhere. Try to incorporate real life examples of geometric shapes into your lessons. Here’s how to easily show your class some great photos:

1. Visit Flickr‘s advanced search at http://www.flickr.com/search/advanced.
2. Scroll down, and click on “Only search within Creative Commons-licensed content”.
3. Type in a keyword and run a search.
4. Sort by “Most relevant” or “Most interesting.”
5. Click the Slideshow button in the top right corner.

Here is an example of a slideshow, taken from an amazing minimalist photographer Zel Nunes: