Ladybird Do You Know? is a STEM-based ELT graded reading series recommended for children aged 5+ who are learning English as a foreign or second language. These levelled non-fiction books feature video content , project work and critical-thinking activities . Each book asks a range of BIG questions on STEM topics from nocturnal animals to building bridges, developing children's language , communication and investigation skills . The four levels progress from CEFR Pre-A1 to A2 . Visit the Ladybird Education website for online video content, audio, comprehension activities, and suggestions for project work. Earth, 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. Do the continents move? Where did Pangea go? What is inside a cave? Find out more about mountains, caves and land on Earth.