Place Value within 20 - Order groups of objects - Presentation

In a foundational mathematics lesson centred around place value within 20, students are introduced to the concept of ordering groups of objects. The aim of the lesson is to enable students to identify and order objects by size, discerning which are the greatest and which are the smallest. The lesson begins with a discussion on how to determine the relative sizes of different groups. Students are then presented with practical tasks, such as ordering groups of crayons and chips, to apply their understanding of size comparison. The activity prompts students to think critically about the attributes that define the size of a group, whether it be the number of objects or their arrangement.

Further activities challenge students to use cubes to represent numbers and arrange them from the greatest to the smallest, and vice versa. This hands-on approach not only reinforces the concept of place value but also encourages students to engage with the physical representation of numbers. Throughout the lesson, reasoning tasks are incorporated to deepen understanding, such as exploring different ways to order fruits in baskets and evaluating the accuracy of a peer's object ordering. Independent work tasks ask students to order crayons, use counters to correct representations, and draw tens and ones to ensure accuracy. Discussion questions stimulate critical thinking, asking students to consider the effects of changing numbers around and to compare their methods with those of their classmates.