I tried to find a simple projects for my students and the topic I chose was weather. There is a project for younger grades that my adult students would be able to do. My students are adult refugees who are learning the very basics of computer and internet skills. This project has students first reading maps to find cities, finding the city's temperature on the internet, and looking at the climate data for that city. They have to decide what the difference is between weather and climate. They also look at the map and compare and contrast different cities.
One of the features of this site that I love is the Educational Resources page, especially Ask an Expert. I recently did a unit on the Solar System and we could have used this page when questions came up. It's a fun feature and I can totally see my students loving this!