The Blue Planet series has been written to spark the imagination and curiosity of students with exciting science topics and activities. At the same time, it will help them as English-language learners to improve their reading, writing, listening, and speaking skills in English. Blue Planet is a six-level series for elementary students. It integrates content instruction in science with English-language instruction, promoting language acquisition in a wide range of interesting topics and contexts. A good variety of hands-on activities and experiments will help students make a connection between what they can see, do, and touch and the scientific basis of their findings, thus making learning about their world both engaging and relevant.