Students were required to research various scientists who played an important role in the development of the atomic theory. Using their findings, students were to create a trading card and share their card with their classmates in a jigsaw activity.

This is a fun activity for students that collect trading cards. It takes a bit of work, but it is well worth it. Visit readwritethink to create the cards. You will have to be patient, and use screen captures and cropping to print the cards and have students glue them together (unless the site has changed since I last used it!). Train one tech-smart student how to do this, and let them be in charge of helping everyone else that selects this activity if possible. You will probably be restricted to printing your cards in black and white, but then you can always have your students colour them and glue them onto coloured paper to add some colour.
If fussing with the web site does not appeal to you - you could always make your own template as an MSWord document, or have the kids make them by hand instead as well.
An example of a Grade 5 level assignment is included below as well as an example.

Students create their own monster trading cards using "powerful," vivid language to describe their creatures.

Trading Card Creator This tool provides a fun and useful way to explore a variety of topics such as a character in a book, a person or place from history, or even a physical object. An excellent tool to for summarizing or as a prewriting exercise for original stories.