Oklahoma Ag in the Classroom Harvest of the Month Posters A project of Oklahoma Ag in the Classroom and Oklahoma Farm to School, funded by a 2009 USDA Specialty Crop Block Grant Click on the posters for larger images. Asparagus Cabbage Cucumber Grapes Peaches Pecans Spinach Summer Squash Strawberries Sweet Potatoes Tomatoes Watermelon Oklahoma Ag in the Classroom Oklahoma Ag in the Classroom is a program of the Oklahoma Cooperative Extension Service, the Oklahoma Department of Agriculture, Food and Forestry and the Oklahoma State Department of Education.