Heat Map Tool is a tool for easily creating heat maps or incident maps from a CSV file. To create a heat map all you need to do is upload a CSV file then specify your desired display attributes like scale, colors, and opacity. You can edit the display attributes of your map whenever you like. If you're wondering how to create a CSV file you can do so by exporting from a spreadsheet in Google Documents or exporting from an Excel file. Click here for directions on exporting from Excel. The free version of Heat Map Tool allows you to have up to 100 data points on your map and up to 500 hits per day on your map.
Applications for Education
Like Map a List and Spreadsheet Mapper, Heat Map Tool could be a good tool for students to use to create visualizations of geography-related data that they collect. Students could gather and display data about people's habit in their community or throughout the world. For example, you could have students gather data about dialects and display that information on a map.