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Unit 1 Nature
　　Reading A
　　Digging in
　　Listening and Viewing
　　Moving Forward
　　Reading B
　　Further Exploration
　　Self-assessment
Unit 2 Animals
　　Reading A
　　Digging in
　　Listening and Viewing
　　Moving Forward
　　Reading B
　　Further Exploration
　　Self-assessment
Unit 3 Food
　　Reading A
　　Digging in
　　Listening and Viewing
　　Moving Forward
　　Reading B
　　Further Exploration
　　Self-assessment
Unit 4 Sports
　　Reading A
　　Digging in
　　Listening and Viewing
　　Moving Forward
　　Reading B
　　Further Exploration
　　Self-assessment