... questions: a. Have you ever seen a compost heap? b. Do you know how to make compost? Ask Ss to work in pairs to discuss about to make a compost heap. Unit 1 0: Recycling Period 6 3: Lesson 3: Listen ... the work book, ( p:60.) 3. New lesson - Introduce some new words: Compost heap: hầm ủ phân xanh Tea leaves: lá chè Egg shells: vỏ trứng Moisture: độ ẩm Condensation: sự ngưng tụ - Introduce ... following things: + Paper: paper, old newspaper, books, card board boxes. + Glass: bottles, glasses, jars + Plastic: plastic bags, plastic bottles. + Vegetable matter: friutpeels, vegetables....