In this lecture, students learn how to convert between different metric units such as kilometres, meters, centimetres, and millimetres. They explore the idea that converting from a bigger unit to a smaller unit requires multiplication, while converting from a smaller unit to a bigger unit requires division. A fun mnemonic “Karam Hussain Died By Drinking Cold Milk” is introduced to help remember the order of metric units. Students practice real-life examples using rulers, measuring tapes, and conversion tables, covering distance, weight, and volume conversions. The lecture makes unit conversion easy and enjoyable with engaging tips, examples, and fun activities.