I want my students to be able to collaborate with their friends about their research topic, so I set up a class Wiki site for the students to post their topic as well as their 3 reasons why they chose their topic. One of the important parts was teaching the students to write strong comments to each other. I was looking for more than "I like koala bears too." After lots of modeling, I am pleased with their comments to each other. Here is a sampling from a koala bear wiki.