This context clue graphic organizer is great for both your fiction and nonfiction reading. You can have your students write in words they are unfamiliar with as they are reading or you can have words pre-written in the word box and then have your students fill in the rest of the chart. This graphic organizer is great tool to help students use strategies to figure out unknown words.
If you like this product, you may be interested in my other vocabulary graphic organizer.
And here's a great unit on Polar Bear in the Arctic - the Magic Tree House companion to Polar Bears Past Bedtime.
Polar Bears and the Arctic Study Guide