Rationale: This text set is intended for third grade and is about oceans and things that live in the ocean. With this text set, students will learn about oceans and explore a variety of ocean life through different forms of materials. Oceans and the living species in it are important to study because oceans make up about 70% of Earth. It is important for students to understand there are many different creatures living in the ocean just like on the surface of the Earth. Students need to understand that humans living on any part of the Earth affect the ocean and ocean life on a daily basis. With this understanding and the knowledge of what lives in the ocean, they can help protect the Earth's oceans.