A differentiated Year 1 maths worksheet pack for practising addition within 20. This woodland-themed resource includes three levels of challenge, making it easy to support different levels of confidence within the same class. Included: ● Supported - pictorial addition using ten frames ●● Core - addition calculations within 20. ●●● Extending - missing numbers, reasoning and problem solving Teacher answer sheet The activities progress from visual representations to independent calculations and reasoning, allowing pupils to build fluency and confidence with addition. Curriculum link: Year 1 Number - Addition and Subtraction: add and subtract one-digit and two-digit numbers to 20, including zero. Suitable for: independent practice small-group work maths intervention homework assessment early finishers Format: Printable PDF. Answers included The final downloadable resource also includes an introductory teacher page explaining the pack, curriculum link and suggested uses.