Becca Palczynsky January 15, 2014 2014, GFL, Middle, OAS, High School, U.S.A. Two Bits for Our National Parks Becca Palczynsky January 15, 2014 2014, GFL, Middle, OAS, High School, U.S.A. Click on the image above to download the lesson. Description: Students will gain knowledge of the National Park system and its diversity across our nation. Grade level(s): Middle and High School Standards: OAS, GFL Produced By: Bob Harrelson