I created this unit for my class and it worked perfectly.
The unit is meant to print front to back. Every chapter has comprehension questions on one side and vocabulary, graphing, integrated math, or other fun activities on the back side.
I have incorporated fun facts throughout the unit, which my students loved learning!
The amazing Clipart and Background courtesy of Alefclipart: http://www.teacherspayteachers.com/Store/Alefclipart
Please let me know your thoughts!