Be sure to go to

www.mathwire.com. Type geometry in the search window at the top of the page. You will spend hours looking at all the wonderful things they have at this site. They also suggest great literature for each math topic.

I discovered a snowflake activity using pattern blocks at mathwire. Students build a snowflake along a line of symmetry. There are several levels to this activity.

I have my students build two and three-dimensional shapes using straws and twist ties. They love doing this. I cut the straws to four, six, and eight inches long. This takes awhile, but you will be able to use the straws in the coming years. I store the straws by length in storage boxes with covers. The boxes are slightly bigger than sandwich boxes.

Something else I do for geometry is find the lines of symmetry for the uppercase letters of the alphabet. I sure like the idea of finding lines of symmetry for a child's name that was mentioned above.

Students can also make a design/picture using pattern blocks. (My volunteers cut out paper ones so after my students design it with the blocks, they can use the paper shapes to glue their design/picture to paper.) The kids make a chart...number of hexagons, trapezoids, triangles, large and small rhombuses, count the number of angles, and count the number of sides. This chart is glued in a corner of their design. These make a great display.

Read books about quilting, research quilt squares, and then design a single square or class quilt. There are plenty of books with quilt themes, so maybe you could incorporate these books into your guided reading groups. (Again, I suggest you type quilting into the search box on mathwire. You will get some other sites, literature suggestions, and activities to enhance your study of geometry using quilting.)

I use these books:
--__The Quiltmaker's Gift__ by Jeff Brumbeau and the sequel __The Quiltmaker’s Journey__
--__The Greedy Triangle__ by Marilyn Burns
--__The Quilting Bee__ by Gail Gibbons
--__The Quilt Story__ by Tony Johnson
--__The Patchwork Quilt__ by Valerie Flournoy
--__The Keeping Quilt__ by Patricia Polacco
--__Cloak for a Dreamer__ by Aileen Friedman
--__Sam Johnson and the Blue Ribbon ____Quilt__ by Lisa Campbell Ernst
Don't forget __Grandfather Tang's Story__ by Ann Tompert. Tangrams are very high-interest for kids, and work great when teaching geometry.
A concentration game with geometry vocabulary on one card and a picture/definition on another card is always fun.

Check out this link on ProTeacher.

http://www.proteacher.org/c/313_Geom...ctivities.html
Here are some task cards for shapes, triangles, and angles.

http://www.proteacher.net/discussions/showthread.php?t=148399
http://www.proteacher.net/discussions/showthread.php?t=149425
http://www.proteacher.net/discussions/showthread.php?t=148973
I hope some of these suggestions help you.