L5 Compare Mass (g, kg)

This engaging Year 3 maths lesson focuses on comparing mass in grams (g) and kilograms (kg) through practical, hands-on learning rather than worksheets. Pupils explore how to determine whether objects are heavier, lighter or of equal mass by using balance scales and real-life classroom materials. Children develop a secure understanding of standard units of mass and learn when to use grams or kilograms appropriately. Through practical activities, they estimate and compare the mass of different objects, justify their reasoning and use key mathematical vocabulary such as “heavier than,” “lighter than,” and “equal to.” The lesson encourages active participation, discussion and problem-solving, allowing pupils to physically handle objects and make meaningful comparisons rather than relying on abstract written tasks. By working collaboratively, they deepen their understanding of mass and strengthen their ability to reason mathematically in real-world contexts. Designed to reduce reliance on worksheets, this lesson supports mastery of the Year 3 maths curriculum while promoting engagement, curiosity and confident use of measurement skills in everyday situations.