We do a fun unit on Earth Science in which we combine all of our Earth science book units. I teach a lesson from each unit, but the main learning comes when students guide their own learning. What I mean is, I have a large assortment of books that I provide on the different subjects (weather, erosion, earthquakes, volcanoes, Earth's layers...), and the students choose what it is they want to learn more about and post sticky notes about this learning on a wall in our room.
The wall is divided into the different topics of the unit. Students are given specific days during science for this investigation, but they are also allowed to work on it during reading workshop if they choose. Our wall slowly fills up with post it notes.
As we are coming to the end of the unit, students then can look at all of the post-it notes (not just their own) and they must share a new, interesting fact with us about two of the different topics. Their sharing is pretty much their choice, but they have to provide a few sentences about their fact (the hard part is IN THEIR OWN WORDS), and provide a visual to accompany it. The visual can be a chart, diagram, a picture, an artwork, a craft, or a digital product.
With the digital products, students found websites, created Vokis, or made other online products, we created QR codes for them, and posted the QR codes. Visitors could use their smartphones to then access what the student wanted to share. We used QRstuff.com to create the QR codes.