Place Value within 20 - Count one more and one less - Worksheet

The "Place Value within 20 - Count one more and one less" worksheet is a teaching resource aimed at helping Year 1 children understand and practice the concept of identifying the number that is one more or one less than a given number up to 20. The worksheet is part of a lesson where the National Curriculum objective is to enable children to pinpoint the number immediately before or after a given number. To facilitate this learning, various resources such as differentiated sheets, teaching slides, and concrete equipment are utilised. The vocabulary for the lesson includes terms such as 'number', 'identify', 'one more', 'one less', 'count', 'tens', 'ones', 'represent', and 'digit'.

Children are encouraged to use counting skills and hands-on equipment to grasp that adding one more results in an increment of a single unit, not ten, thus addressing a common misconception. The worksheet prompts children to find one more and one less than specific numbers, using visual aids and physical tools to reinforce the concept. As they progress, they are expected to identify the original number after performing the addition or subtraction of one. For those with a secure understanding, the worksheet presents numbers in various pictorial formats, challenging them to apply their place value knowledge. Additionally, the worksheet includes reasoning and problem-solving questions, where children use number cards to work out age-related puzzles and explore different ways to complete given tasks, enhancing their critical thinking skills.