Discover meteorology with the Weather Tracker! Introduce isobars, jet streams, wind chills and more with this super-sized weather map of the U.S. and Canada. Record temperatures and precipitation using bar and line graphs—a great way to combine math and science lessons. Write-on/wipe-off board features grommets for easy hanging display. Convenient tri-fold format allows upright display, flat folding for storage, and a handy carrying case for weather on the go. Teacher's Guide with weather terms, activities, vinyl cling weather symbols and student recording charts included.