| Unit 2 Opener | 148a | |
| Unit 2 Skills Overview | 148c | |
| Unit 2 Monitor Progress | 148e | |
| Grouping for AYP | 148g | |
| Theme Launch | 148 | |
| Unit 2 Concept Development | 149a | |
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Time for Science Penguin Chick |
150a–173n |
| Plants—Fitting into Their World | 170 | |
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Time for Social Studies A Day's Work |
174a–197n |
| What Is a Weed? | 194 | |
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Time for Social Studies Prudy's Problem and How She Solved It |
198a–223n |
| Meeting the Challenge of Collecting | 220 | |
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Time for Social Studies Tops and Bottoms |
224a–249n |
| The Hare and the Tortoise | 248 | |
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Time for Social Studies William's House |
250a–271n |
| Log Cabins | 268 | |
| Unit 2 Concept Wrap-Up | 272a | |
| Unit 2 Reading Poetry | 272 | |
| Unit 2 Wrap-Up | 276 | |
| ELL Glossary | 277f | |
| Writing and Assessment | WA1–WA18 | |
| Leveled Resources | LR1–LR48 | |
| Differentiated Instruction | DI•1-DI•60 | |
| Teacher Resources | TR1–TR40 | |