Place value within 100 - One more one less - Presentation - Starter

In a Year 1 mathematics lesson, students are encouraged to master the concept of place value within 100, with a focus on identifying one more and one less. The lesson includes a variety of activities that cater to different aspects of number understanding. For instance, the 'Fluent in Four - Revision' section provides quick-fire subtraction problems such as '18 – 13 = 5' and 'Double 7 – half of twelve = 8', which are designed to reinforce mental arithmetic skills. Pupils are also asked to sequence numbers from smallest to largest, enhancing their ability to compare and order numbers effectively.

Further interactive tasks involve determining which row has the most blocks and by what margin, thus practicing counting and comparison. The children are prompted to complete statements related to quantity, such as filling in the blanks to indicate which item has 'the most cookies' or to compare quantities using 'more than'. Additionally, the lesson incorporates a practical exercise in which students must show one more and one less than a given number, both pictorially and numerically. This concept is further applied in a real-world scenario involving birds in a tree, where students must calculate the changing number of birds as they come and go. Finally, the lesson includes a number line activity where students count in twos, helping them to grasp the concept of even numbers and incremental counting.