How do we make electricity? Can a potato be a battery? Find out more about circuits, transistors and batteries. Electric World, Level 3 Reader, is A1+ in the CEFR framework and supports YLE Movers exams. The longer text is made up of sentences with up to three clauses, some expression of future meaning, comparisons, contractions and relative clauses. 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 criticalthinking 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.