Active learning ideas
Nutrition in Humans covers the complex journey of food through the alimentary canal. Students explore the roles of various organs, from the mouth to the large intestine, and the specific enzymes that facilitate chemical digestion. This topic is a core component of the 'Maintenance of Life' unit in the MOE syllabus, emphasizing the transition from complex to simple, soluble molecules.
Activity 01
Transform the classroom into a giant alimentary canal. Students move through 'stations' (mouth, stomach, small intestine) carrying a 'food bolus' (a ball), performing specific tasks like adding 'enzymes' (stickers) or 'mashing' (mechanical digestion).
Why do atoms form ions?
Activity 02
Groups use flat paper versus folded paper (representing villi) to absorb water. They measure the difference in absorption speed and volume, relating this to how the small intestine's surface area maximizes nutrient uptake.
How is an ionic bond formed?
Activity 03
Students discuss the liver's role in processing absorbed nutrients. They compare the liver to a Singapore distribution center that sorts, stores, and sends out 'goods' (glucose, amino acids) to the rest of the body.
How do we represent ionic bonds using dot-and-cross diagrams?
Templates
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A few notes on teaching this unit
Watch Out for These Misconceptions
Digestion only happens in the stomach.
Many students overlook the mouth and small intestine. A 'digestion map' activity where students color-code where carbohydrates, proteins, and fats are broken down helps them see that digestion is a multi-stage process.
Bile is an enzyme that digests fats.
Bile emulsifies fats (physical change) but does not chemically break them down. Using a demo of dish soap and oil helps students visualize emulsification as a way to increase surface area for lipase to work on.
Methods used in this brief
Covalent Bonding
Students investigate the sharing of electrons between non-metal atoms to form covalent molecules, comparing single, double, and triple bonds.
8 methodologies
Structure and Properties of Materials
Students relate the physical properties of substances to their bonding and structure, comparing giant ionic lattices and simple molecular structures.
8 methodologies