I like to use charts in the classroom. Having students gather data in Spanish, use the data to create a chart and then writing sentences to summarize their results covers a big spectrum of activities and skills.
There are also many sites with information stored in charts or infographics. Great visuals for class!
To start with here is a Periodic Table of Visualization Methods. It shows you all of the different types of charts possible.
Some other favorites:
Create Charts Online (or have students make them…):
Google Charts Tool: Awesome & simple! Get a link or embed code
Create a Graph: Easy to use from Kids Zone
Crappy Graphs: Funny stuff here & easy graph maker
Charts Online for Research/Information:
Charts Bin: Many categories, information is shared as charts or maps.
Visual.ly: Infographics sorted by subject
7 Tools for Creating Data Visualizations: by Free Tech 4 Teachers
As always, let me know if you have other ideas and resources!