Lessons on ReadWriteThink can be sorted by literacy engagements so that teachers can highlight specific language functions in the classroom. Following M. A. K. Halliday's model, lessons are designed to engage students in authentic and meaningful language learning (1982). Literacy engagements simultaneously involve learning language (as students listen to it and use it with others in their everyday lives), learning about language (as students try to figure out how it works, engage with their teachers in focused instruction on how it works or in critiquing its impact), and learning through language (as students use it to learn about or do something).