Today’s lesson focused on understanding mass, including reading and writing standard metric units like grams and kilograms and learning how to convert between larger and smaller units. The class engaged in a “Who Wants to Be a Millionaire” game to review unit conversions, using examples such as the weight of sugar and elephants. The concept of mass was defined as the amount of matter in an object, with examples provided to illustrate how common items relate to grams and kilograms.