Active learning ideas
Coordination and Response introduces the nervous system as a rapid communication network. Students learn about the structure of neurones, the pathway of a reflex arc, and the difference between voluntary and involuntary actions. This is a key part of the MOE Section IV syllabus, focusing on how organisms detect and respond to stimuli.
Activity 01
Pairs test their reaction times by catching a falling ruler. They then introduce distractions (e.g., talking, music) to see how the nervous system's response time is affected, recording and graphing their results.
What is a mole in chemistry?
Activity 02
Students stand in a line representing a reflex arc (Receptor -> Sensory Neurone -> Relay Neurone -> Motor Neurone -> Effector). They must pass a 'signal' (a squeeze or a ball) as quickly as possible to demonstrate the pathway.
How is the mole related to the Avogadro constant?
Activity 03
Groups create large-scale drawings of sensory, relay, and motor neurones. They must label the myelin sheath, axon, and dendrites, and explain how each structure helps the neurone perform its specific role in the circuit.
How do we calculate the molar mass of a substance?
Templates
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A few notes on teaching this unit
Watch Out for These Misconceptions
The brain is involved in every single response.
Reflex actions often bypass the conscious brain to save time. Use the 'Human Reflex Arc' simulation to show the signal going to the 'spinal cord' (a student in the middle) and back out before the 'brain' student even knows it happened.
Nerve impulses are just like electricity in a wire.
While they are electrical, they are also chemical (at the synapse). Use a 'Think-Pair-Share' to discuss why there's a tiny delay at synapses, explaining that the signal must change from electrical to chemical and back again.
Methods used in this brief
Chemical Formulae and Equations
Students learn to write chemical formulae for elements and compounds, and construct balanced chemical equations with state symbols.
8 methodologies
Chemical Calculations
Students apply the mole concept to perform stoichiometric calculations based on balanced chemical equations, including reacting masses and gas volumes.
8 methodologies