Place Value within 20 - Tens and ones part whole model - Planning

The initial lesson for Year 1 Autumn term on Number and Place Value within 20 introduces the concept of tens and ones using the part-whole model. A variety of resources, including differentiated worksheets, teaching slides, and concrete materials like base 10 blocks and counters, support the learning process. Key vocabulary such as 'tens', 'ones', and 'part-whole model' is central to the session, and children are encouraged to become familiar with these terms. The lesson begins with a starter activity where numerals and number words for teen numbers are displayed, prompting children to create matching pairs. As the class progresses, children apply their understanding of tens and ones through practical activities, using base 10 equipment and large part-whole models to represent teen numbers, including the recognition that numbers like 10 and 20 have no ones.

The teaching method incorporates partner work to encourage discussion and the use of full sentences to articulate mathematical reasoning. For example, children might say, "My number is 14. I have one ten and 4 ones." This hands-on approach helps them grasp that numbers can be partitioned into tens and ones, which can then be combined to form a whole number. Reasoning and problem-solving activities challenge students to explore different ways to make numbers up to 20 and to understand that the value of tens and ones remains the same even when their positions are swapped. The lesson concludes with reflection on the skills learned and a promise to remember the key concepts. Differentiated activities cater to varying levels of understanding, from recognizing tens and ones in numbers up to 20 to completing part-whole models and writing number sentences in numerals.