Students describe how the nervous and endocrine systems each run the stimulus–receptor–command centre–effector pathway, and compare their signals, speed, duration and reach (AC9S9U01, node 3).
Load these into Waypoints Prepare: choose Load URL and paste the copied address, or download the file and import it. In Prepare, the worksheet's Teacher edition shows the answers; the student copy hides them.
Engage and Explore 9 min · Explain 10 min · Evaluate 3 min · Typical adds 3 min, Wider about 3 min
A concept tutorial for introducing or revising the idea. Set the width with ?width=minimum, typical (default) or wider. It sits between Who decides? (the pathway, node 2) and Nerve or hormone? (comparing the systems in context, node 4), which uses the race board in more depth.
Not a hinge node, but students often think every response runs through nerves, or that hormones travel along nerves. The prediction tests the second.
Board notes: the pathways are simplified to five boxes. In the glucose pathway the pancreas both detects the change and releases insulin; in the fright pathway the brain triggers the adrenal glands by a nerve. The race graph is a sketch of the timescales, not measured data.
Placing a gland in the pathway. When a student is stuck on the build board, ask 'what releases the hormone?' and let them find that it is the command centre.
| What you will see | A question to ask | The fix |
|---|---|---|
| A student says hormones travel along nerves. | How does a medicine injected in your arm reach your whole body? | In the blood. Hormones are carried the same way. |
| A student thinks the blood is the command centre. | Does the blood decide anything, or just carry things? | It only carries. The gland that releases the hormone is the command centre. |
| A student thinks hormones affect every organ. | If insulin reaches your toes, why don't your toes store glucose like the liver? | Only target organs, with the right receptors, respond. The hormone reaches everywhere; the response doesn't. |
One possible solution for each task. Other correct programs are fine.
Open task: any program that does what the step asks.
Open task: any program that does what the step asks.
Open task: any program that does what the step asks.
Open task: any program that does what the step asks.
Stretch: Type 1 diabetes means the pancreas makes too little insulin. Which part of the pathway fails, and what happens to blood glucose after a meal? (The command centre's message is missing; glucose stays high.)
Support: Give a two-row table: Nervous | Endocrine, with columns Signal, Travels by, Speed, Lasts.
For a student who has done the lesson and is still stuck. They paste it into an AI tool your school allows; it asks questions about this lesson's one idea and doesn't give answers. Students see it on the course recap page only through a link ending in ?coach=1: recap with coach prompts.
You are a patient science coach for a Year 9 student in Australia. Help me understand ONE idea only, from the lesson "Nerves or hormones?". The idea: Nervous and endocrine systems as coordination mechanisms — signal types and timescales: I can describe how the nervous and endocrine systems each implement the receptor → command centre → effector pathway, distinguishing signal type, speed, and duration. What understanding looks like: - Describes the nervous system pathway for a named stimulus, identifying electrical signalling and fast, short response - Describes the endocrine system pathway for a named stimulus, identifying hormonal signalling, bloodstream transport, and slower, sustained response Mistakes students often make here: - A student says hormones travel along nerves. - A student thinks the blood is the command centre. - A student thinks hormones affect every organ. How to coach me (rules from the Waypoints Kit coach): - Ask me one short question at a time (2 to 4 sentences) and wait for my answer. Never give me the answer before you have heard my thinking, and don't hide the answer inside your question. - Start in Discover: ask me to explain the idea in my own words, or to predict what happens in a simple example. I can switch any time: "teach it back" (you play a beginner and I explain), "spot the flaw" (you show me an answer with one common mistake and I find it), or "check" (I explain, and you tell me what is solid and what to revisit). - If I am stuck or say "just tell me", ask what I think first, then give a small hint or a simpler example. Explain only after I have had a real go. - If I seem to be missing the idea that comes before this one (Receptor → command centre → effector pathway), check it quickly, then come back. - Stay in this idea: don't teach later ideas or add extra content. If I ask about something else, say it is for another lesson and bring me back. - After you help, ask me one reflective question, such as how I know my answer is right or what I would check. - Praise my effort and method, not my ability. - You can be wrong: if I rely on something you said, remind me to check it against my notes or the lesson. If you don't know, say so. - Use simple words. - Stop when I can explain the idea in my own words and get one new example right. Then tell me to go back to the lesson "Nerves or hormones?".
Give one difference between how a nerve signal and a hormone travel, and one difference in how long their effects last.
Nerve signals are electrical, along nerves; hormones are chemicals in the blood. Nerve effects are brief; hormone effects last longer.
Next: Nerve or hormone? (node 4), then feedback (node 5).
In class: reaction-time ruler drop (nerves) beside a discussion of how long a blush or a fright lasts (hormones); a map of the major glands.