L3 Mass

Year 2 Spring Term Measurement – Lesson 3: Mass in Grams (Slides & Planning) Lesson Overview: In this Working Without Worksheets lesson, Year 2 pupils learn to measure mass using grams. Building on their earlier work comparing heavier and lighter objects, children are introduced to grams as a standard unit of measurement for light objects. The lesson begins with estimating which items are heavier or lighter, before moving on to using balance scales and 1g weights to measure accurately. Pupils predict the mass of classroom objects, test their ideas, and record their findings, while developing their understanding of key measurement vocabulary and tackling common misconceptions such as “bigger means heavier.” What’s Included in the Pack? ✔ Full lesson plan with clear objectives, teaching notes, and plenary guidance ✔ Animated teaching slides demonstrating how to measure in grams using balance scales ✔ Starter: Compare classroom objects using balance scales (heavier, lighter, equal) ✔ Teaching input: Introduce grams as a unit of mass, model balancing scales with 1g weights ✔ Main activity: Partner investigation – predict and measure the mass of objects in grams ✔ Plenary: Share findings and discuss strategies for estimation and checking accuracy ✔ Guidance on common misconceptions: size ≠ weight, direction of balance scales ✔ Engaging, practical, and worksheet-free learning Why Teachers Love This Resource ✔ Clear introduction to standard units of mass (grams) ✔ Combines estimation, prediction, and accurate measuring ✔ Hands-on and practical, using balance scales and real objects ✔ Tackles misconceptions directly through discussion and modelling ✔ Fully aligned with Year 2 National Curriculum objectives and Working Without Worksheets pedagogy Curriculum Links (Year 2 Measurement, National Curriculum) This lesson helps children to: ✔ Choose and use appropriate standard units to estimate and measure mass (grams) ✔ Use balance scales accurately with 1g weights ✔ Apply mathe