Decimals - Halves and Quarters - Presentation

In a comprehensive set of teaching slides on decimals, students are engaged in learning how to express halves and quarters as decimals. The lesson begins by challenging students to represent the fractions 1/2, 1/4, and 3/4 on a place value grid, facilitating a deeper understanding of the relationship between fractions and decimals. The slides provide a visual aid through a rekenrek, or a counting frame, with 100 beads, allowing students to visualise the concept of halves and quarters. For example, with 100 beads on the rekenrek, if half of the beads are green and half are blue, students learn that 1/2 is equal to 50 out of 100, which translates to 0.5 as a decimal.

As the lesson progresses, students move on to Activity 2, where the rekenrek is used to divide the beads into four equal groups, helping students understand that one quarter of the beads is 25 out of 100, and three quarters is 75 out of 100, which is equivalent to the decimal 0.75. The lesson also includes reasoning exercises where students analyse and correct misconceptions, such as Rosie's error in converting fractions to decimals by placing the numerator and denominator in the incorrect place value columns. Independent work tasks prompt students to apply their understanding by completing missing information and explaining their reasoning behind converting fractions to decimals. The lesson encourages discussion and the use of place value counters to represent quarters, both as fractions and decimals, solidifying the concept through practical application.