The document discusses two units - Unit 21 and Unit 22 - from a class on math and science for young children. Unit 21 covers applying mathematical concepts like comparing, ordering, and patternning to examples in science. It instructs students to define the key terms and respond to review questions. Unit 22 discusses integrating curriculum through dramatic play and thematic units focused on a topic like food. It advises students to consider culture and role model healthy foods when choosing examples. Students are asked to define key terms and respond to selected review questions.