Start with something noticed
Inquiry-based STEM asks students to investigate questions, not just follow procedures. The hardest part for many classes is the beginning: where does a good question come from? Asking students to “think of a research question” often produces either something enormous, such as how to stop climate change, or something already answered in the textbook. A more reliable starting point is an observation from everyday life.
Observations are concrete. Ice cubes in one cup melt faster than in another. The classroom feels stuffy after lunch. Bread in one cupboard goes mouldy before bread in another. Phone batteries seem to drain faster on cold days. Each of these is small, local, and something a student actually saw. That makes it a good seed.
Step 1: Notice and record
Ask students to write the observation as plainly as possible, with where and when they saw it. “The ice in the metal cup melted before the ice in the plastic cup, at lunch, on the classroom table.” No explanation yet. Recording the observation separately from any explanation is an early habit of evidence-based thinking, and it gives the class something to return to later.
Step 2: Wonder in several directions
Next, have students write at least five questions about the observation without judging them. Why did the metal cup melt the ice faster? Does the colour of the cup matter? Would it happen outside? How much faster was it? Would a thicker cup change anything? Quantity matters at this stage. The first question is often the most obvious; the fourth or fifth is often more interesting and more testable.
Step 3: Narrow to one variable
Now choose one question and narrow it until it names one thing to change and one thing to measure. “Why did the metal cup melt the ice faster?” becomes “Does cup material change how long an ice cube takes to melt?” and then “How long do equal ice cubes take to melt in metal, plastic, and paper cups at room temperature?” The final version names the variable you change, the material, and the thing you measure, the time.
Check the narrowed question against three tests. Can the class do it with available equipment and time? Is it safe? Is the answer not already obvious from a quick look in the textbook? If any answer is no, narrow again or choose another question from the list.
Step 4: Plan a first test
Write a short plan: what you will keep the same, such as cube size, starting temperature, and room; what you will change, the cup material; what you will measure, the time until fully melted; and how many times you will repeat it. Students should also write what they expect to happen and why, before running the test. That prediction turns the activity from a demonstration into an inquiry.
Tips for teachers
Run the first cycle as a whole class with one shared observation, then let groups choose their own observations in the second cycle. Collect the lists of wonder questions; they make a useful bank for later lessons. When a group’s question is too broad, ask which single thing they could change this week rather than rejecting it. When a group’s question is too narrow or trivial, ask what they would want to know next if they had the answer.
Keep the trail
Ask students to keep the observation, the wonder list, the narrowed question, and the plan on one page in their inquiry notebook. When they present their findings, that page shows how the question was formed. Reviewers and families can then see the thinking, not just the result, which is the point of inquiry-based learning.
A second example: bread and mould
A student notices that bread kept in the classroom cupboard went mouldy faster than bread kept at home. The wonder list might include: is the cupboard warmer, is it more humid, was the bread a different type, was it opened more often, does the bag matter? Narrowing picks one variable. “Does storage temperature change how many days pass before visible mould appears on slices of the same loaf?” The plan keeps the bread, the bag, and the starting day the same, places slices in a cool spot and a warm spot, and checks once a day. Mould samples should stay sealed in their bags and be disposed of without opening, following the teacher’s safety guidance.
When the first question does not work
Sometimes a narrowed question turns out to be impossible to test well: the difference is too small to measure, the equipment is not precise enough, or a hidden variable keeps changing. That is not a failure of inquiry. Go back to the wonder list and pick another question, or narrow the same one differently. Record why the first question was dropped. A note such as “stopwatch timing was not precise enough for melting differences under ten seconds” is a real finding about method, and it helps the next group avoid the same trap.
What families can ask at home
Families can support inquiry without supplying answers. Ask what the student noticed, what they wondered about, and which single thing they decided to change. If the student can explain why they chose that variable and what they expect to happen, the inquiry is on track, whatever the result turns out to be. Everyday observations at home, such as why one plant grows faster or why one drink cools quicker, make good practice questions for the notice and wonder steps.
Where to go next
Once students have a narrowed question, the next skills are framing the problem and gathering evidence. See problem framing for students, researchable questions, and evidence habits in STEM, or choose the next inquiry question without restarting when a first test is done.