How do engines move a boat? How do we travel under the sea? Find out more about ships, submarines and engineering at sea.

Do You Know? is a series of levelled non-fiction books featuring video content, project work and critical-thinking activities to motivate and engage young learners. Covering a range of STEM topics from nocturnal animals to climate change, Do You Know? takes an enquiry-based approach, developing children's language, communication and investigation skills.

Recommended for children aged 7+, there are four levels progressing from CEFR level Pre-A1 to level A2. Each reader is accompanied by online video content, audio, video and comprehension activities, and suggestions for project work.

At Sea, a Level 2 Reader, is A1 in the CEFR framework and supports YLE Movers exams. Short sentences contain a maximum of two clauses, introducing the past tense and some simple adverbs.

About the Author

We make growing up the best story ever! Here at Ladybird, we publish books to inspire curious minds. From first words to fluency, we're here for young readers at every step. As the home of Read it yourself, Ladybird Readers and First Words with Peppa, we guide learners from one story to the next - sparking plenty of smiles along the way.

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