Amber Reynolds, left, and Kayla Todd, above, package "Valentine Krispies" in Lindsay Gardner's fourth-grade social studies class at Leetonia Elementary School. The pupils set up an assembly line in their classroom to help them learn the four factors of production. The exercise teaches business and proficiency test skills. Other pupils, left, Ray Woods, Tiffany Stratten and Nick Short, show off some of the "Sweet Hearts" they made. The pupils are selling their products to classmates to raise money for a trip to YMCA Camp Fitch.