Ключевые слова: agriculture, basic, black, certificate, certification, chalk, chalkboard, class, classroom, classrooms, college, coop, course, educate, education, educational, elementary, farm, farming, food, fruit, garden, gardening, grade, growing, instruction, introductory, lecture, natural, organic, organics, presentation, school, spanish, teacher, teaching, technical, train, training, tutor, university, vegetables, white,