Teachers everywhere are embracing the challenge of conveying differences in literacy practices across fields of study. However, whereas disciplinary literacy and inquiry approaches are expanding in popularity at the secondary level, few resources exist for teaching discipline-specific writing in the elementary grades. The authors describe three lessons that emphasize the importance and process of writing in science, from generating questions and hypothesizing to reporting and sharing findings. The authors show how students can write to think like scientists, generate researchable science questions, and use tools such as inquiry charts to organize their writing in discipline-specific ways.