Although school in New Jersey doesn't begin until September, (after Labor Day) I am aware that many districts have already started the 2016-2017 year. I've put together a nice listing of resources, including websites, videos, cartoons and lesson plans.
RESOURCES
Articles on the Summer Olympics- from National Geographic
Infographic: The Physics of Olympic Bodies- from NPR; weightlifters, sprinters, rowers, marathon runners, swimmers
Medals Race- listing of total medals by country
The Official Rio Olympics Site
Ready or Not, Let the Games Begin- interactive story map covers all the conditions in Brazil, including economic, political, health. (zika virus)
Resources for the Rio 2016 Olympics- from TES
Rio 2016: 16 Fun Facts About This Year's Olympics- from NBC
Zika Virus Adding to Long List of Brazil Olympics Woes
CARTOONS
(Great discussions can take place when you share cartoons in the classroom!)
LESSON PLANS and ACTIVITIES
2016 Olympic Summer Games- TeacherVision's list of lessons, worksheets, activities
2016 Olympic Games in Rio on Pinterest
CK-12 Foundation: Olympic Content- "Learn the math and science behind Olympic sports"
E.L.L. Practice + Prompt- by Larry Ferlazzo for The New York Times Learning Network
Olympic Games for Kids- for younger kids; worksheets, puzzles, coloring pages
The Olympic Games- from Scholastic; history of the Olympics, sports and Ancient Greece; all grades
Olympics: Summer- Teacher Planet's list of resources, lesson plans, worksheets
Read, Write, Think- many ideas and activities
Teaching About the 2016 Olympic Games- from NEA
Teaching Resources from the Olympic Museum- lesson downloads available in English, French and German
VIDEOS