Kaneda Elementary School of Kisarazu City has classes entitled "Obitsu River Estuary Tideland," in which pupils learn about a familiar environment as a domestic science subject or as comprehensive learning, in all the grades. Children repeatedly learn about tidelands in parallel with various experiences, and gain deeper understanding by changing their objects of interest as they grow. Through this learning about tidelands, children who can gain thoughtful views and visions about the environment are being educated.