Students measure variation in a population, distinguish continuous from discontinuous and inherited from environmental variation, and explain why inherited variation matters for evolution (AC9S10U02, node 1, a hinge node).
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 7 min · Explain 8 min · Evaluate 3 min · Typical adds 1 min, Wider about 1 min
A concept tutorial for introducing or revising the idea; it pairs well with measuring hand spans or heights in class. Set the width with ?width=minimum, typical (default) or wider.
The hinge misconception is that a species is uniform. The board's population is spread around a middle colour.
Board notes: beetle colour runs from 0 (palest) to 1 (darkest); the starting population is spread around 0.5. Measuring doesn't change the population. The next lesson uses the same beetles under selection.
Telling inherited from environmental variation. When a student is unsure, ask whether the difference could be passed on in a sperm or an egg.
| What you will see | A question to ask | The fix |
|---|---|---|
| A student says the variation is just 'mistakes'. | Would a population where every beetle was identical be better or worse off if things changed? | Worse: variation is normal and useful. |
| A student thinks a scar can be inherited. | Does a scar change the DNA in sperm or eggs? | No: only changes to the genes in gametes are passed on. |
Stretch: Why does a characteristic controlled by many genes give a smooth spread, but one gene gives a few groups?
Support: Give a partly drawn bar chart and a word bank (continuous, discontinuous, inherited, environmental).
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 10 student in Australia. Help me understand ONE idea only, from the lesson "How different are individuals?". The idea: Variation within populations: I can explain that individuals within a population vary in heritable characteristics and identify the sources of that variation. What understanding looks like: - Explains that individuals within a population vary in heritable characteristics - Distinguishes heritable from non-heritable variation - Identifies mutation and sexual reproduction as sources of heritable variation Mistakes students often make here: - A student says the variation is just 'mistakes'. - A student thinks a scar can be inherited. 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. - 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 "How different are individuals?".
Give an example of inherited variation and one of environmental variation in humans.
For example: blood group (inherited); a scar or a language spoken (environmental).
Next: natural selection (node 2) with the same beetles.
In class: measure and graph hand spans; compare with blood groups or earlobes.