This topic introduces the fundamental building blocks of nutrition: carbohydrates, proteins, and fats. Students learn to distinguish between these macronutrients, understanding their specific chemical structures and primary functions in supporting growth, repair, and energy production. In the Singapore context, where diverse food options are readily available, understanding energy balance is crucial for making informed lifestyle choices.
Small groups analyze the macronutrient profile of popular local dishes like Chicken Rice or Mee Rebus using nutritional databases. They must calculate the total energy provided and suggest one modification to improve the energy balance for a sedentary office worker.
Students are given different personas, such as a student athlete versus a student preparing for exams. They individually estimate energy needs, pair up to compare calculations, and then share their reasoning for the differences in macronutrient ratios with the class.
How does energy intake compare to energy expenditure?
Set up three stations focused on Carbs, Proteins, and Fats. At each station, students must match specific food sources to their physiological functions and solve a 'missing nutrient' riddle before moving to the next station.
Fats are entirely bad and should be eliminated from the diet for weight loss.
Fats are essential for protecting organs and absorbing fat-soluble vitamins. Peer discussion helps students realize that the type and quantity of fat matter more than total elimination.
Energy balance only refers to the number of calories eaten.
Energy balance is a dynamic relationship between energy intake and energy expenditure. Hands-on modeling of 'energy in vs. energy out' using physical scales helps students visualize this equilibrium.