Place value within 100 - One more one less - Presentation

In the engaging lesson on place value, specifically tailored for children learning to understand numbers up to 100, the concept of 'one more' and 'one less' is thoroughly explored. The lesson starts with a discussion to ensure that students comprehend the meanings of 'more' and 'less', encouraging them to use these terms in sentences to demonstrate their understanding. Initial activities involve visual representations where students are tasked with identifying one more and one less than a given number. For example, they are shown a number like 86, represented as '8 tens and 6 ones', and then asked to find the numbers immediately before and after it. This visual approach helps to solidify their grasp of the numerical sequence within the context of place value.

Advancing through the lesson, students are presented with more challenging activities, such as filling in missing numbers in sequences to practice identifying what comes just before or after a particular number. They are encouraged to use manipulatives like number cards and counters to support their learning, especially when constructing two-digit numbers and exploring the concept further through reasoning tasks. For instance, they might be asked to adjust counters to make one number one more or one less than another, thereby applying their knowledge to practical scenarios. Discussions prompt students to think about the effects of adding or removing one on the tens and ones place value, and what happens when crossing a ten, such as going from a number with 9 ones to one with 0 ones, or vice versa. This interactive and thoughtful approach ensures that students not only learn to count but also develop a deeper understanding of the structure of numbers within 100.