Classroom Hydroponic Plant Factory by P. Brown, G. Krelle & M. Tam, 123 pages, pap. This comprehensive book uses hands-on growing and observing to introduce hydroponics to students. Lessons are designed separately for elementary, middle and high school levels. Includes 30 worksheets and transparencies
ترست بايلوت
منذ أسبوعين
منذ شهر
