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

In a Year 1 mathematics lesson focused on place value within 20, students are prompted to engage with the concept of counting one more and one less. The session begins with a 'Fluent in Four' revision exercise, where students are encouraged to use 10 counters as manipulatives to aid their understanding of basic arithmetic and place value. The activity requires children to double single-digit numbers and add them together, such as doubling 1 and 4, and then adding the results. They are also tasked with simple addition, such as adding 3 and 4, and understanding the composition of numbers like 15 in terms of tens and ones.

The lesson continues with interactive questioning, where students fill in the blanks to express their number in terms of tens and ones, and compare numbers like 9 and 7, using terms such as 'greater than', 'less than', or 'equal to'. They are also asked to keep track of the number of counters they've used, encouraging them to be mindful of the quantities involved in their calculations. An additional creative task asks if they can form a letter using fewer counters than shown in a provided picture, blending numerical understanding with visual and spatial awareness. This hands-on approach helps solidify the foundational number concepts in a practical and engaging manner.