In a sunlit library room lined with thermoses, dumbbells and trays of seedlings, Harbor City teachers spent Saturday practicing a skill they said students rarely get to see up close: how to turn a simple “huh” moment into a testable idea.

The scene looked less like a lecture and more like a garage experiment. On one table, two French presses sat beside a timer and a kitchen scale. On another, a student volunteer logged push-up counts on a whiteboard. Near the windows, basil sprouts leaned toward the light.

“Kids already do this process all day,” said Arjun Patel, a middle school science teacher who helped run the district’s workshop. “They notice something, they wonder about it, they make a claim, and they expect a result. We’re just putting names to the steps—and making sure the claim can be tested.”

The four steps, in everyday scenes

At the front of the room, facilitators wrote a short progression in thick marker:

Observation → Question → Hypothesis → Prediction

They returned to it repeatedly, swapping in examples that sounded more like student life than lab life.

Observation: What you notice.

A student assistant, Jordan Lee, read from a sticky note: “My iced coffee tastes weaker when I use bigger ice cubes.”

Question: What you want to find out.

“So the question becomes, ‘Does ice cube size change how strong iced coffee tastes after 10 minutes?’” Patel said, gesturing toward the French presses.

Hypothesis: A testable explanation for what you noticed.

“If the cubes are bigger, the coffee will be less diluted, because bigger cubes have less surface area melting at once,” said Tara Kim, a high school chemistry teacher, offering a sentence she said students can debate.

Prediction: What you expect to see in a specific test.

Kim pointed to the timer. “If we pour 200 grams of the same coffee over 100 grams of big cubes and 100 grams of small cubes, then after 10 minutes the big-cube cup will measure higher concentration on a refractometer—or, if we don’t have one, will consistently taste stronger in blind sips.”

Across the room, the fitness table drew a small crowd.

“Observation: I feel less sore when I do a five-minute cool-down,” said Lee, who plays soccer. “Question: Does a cool-down reduce soreness the next day?”

The hypothesis, one teacher suggested, was not “cool-downs are good,” but something narrower: “A short cool-down reduces next-day muscle soreness because it keeps blood moving and reduces buildup of waste products.”

The prediction followed: “If two groups do the same workout, and only one group does a five-minute cool-down, then the cool-down group will report lower soreness scores the next morning.”

At the windows, the plant table turned a familiar complaint into a test.

“Observation: My basil gets leggy and floppy in winter,” said elementary teacher Sonia Ramirez, lifting a thin-stemmed sprout.

The question: “Does the distance from the window affect basil stem strength?”

The hypothesis: “Basil grown farther from light grows taller and weaker because it stretches toward the brightest source.”

The prediction: “If we place identical pots at 1 foot, 3 feet and 6 feet from the same window, then the 6-foot plants will be tallest and most likely to bend.”

A space-themed station, set up with a small telescope and printed sky charts, drew students who had tagged along with parents.

“Observation: Some nights the Moon looks huge near the horizon,” said Lee.

The workshop leader, astrophysics club adviser Nia Henderson, turned it into a question: “Is the Moon actually closer when it’s near the horizon?”

Henderson offered a hypothesis that could be checked: “The Moon appears larger near the horizon because of a perception effect, not because its distance changes dramatically over a few hours.”

A prediction followed: “If we photograph the Moon at moonrise and again when it’s high overhead using the same camera settings, then the Moon’s image size in pixels will be nearly the same even if it looks bigger to our eyes near the horizon.”

A claim has to be breakable

Midway through the workshop, facilitators paused the demonstrations for what they called the “break test.”

“Your hypothesis has to be something reality can argue with,” Henderson said. “That’s the point.”

On a screen, she displayed two columns labeled Falsifiable and Unfalsifiable, then asked the room to sort short statements.

Falsifiable (can be proven wrong with evidence):

• “If I sleep at least eight hours, then my reaction time on a phone app will be faster the next day than when I sleep five hours.”
• “Adding 10 grams more coffee grounds will make the brew measure stronger on a refractometer.”

Unfalsifiable (cannot be proven wrong because it avoids a clear test):

• “My coffee tastes weak because the universe wants me to suffer.”
• “This plant is growing slowly because it doesn’t like my vibe.”

A third set of statements landed in what Henderson called the “moving goalposts” category, where claims change to dodge evidence.

“If the answer can always be, ‘Well, it worked in an invisible way,’ you don’t have a test—you have a story,” she said.

Misconceptions that follow students into high school

Teachers said two misunderstandings show up year after year.

“A hypothesis is not just a guess,” Ramirez said, recounting student lab reports that begin with “I think” and end there. “A hypothesis is an explanation that’s specific enough to test.”

Patel added a second: “Predictions are not the same as hypotheses.”

He held up a sample sentence:

• Hypothesis: “Cooling down reduces soreness because it helps muscles clear metabolites.”
• Prediction: “If we add a cool-down, then soreness ratings tomorrow will be lower.”

“Students often write one sentence and label it both,” Patel said. “We want them to see that the ‘because’ is doing important work.”

Consequences in the classroom

In break-out groups, teachers practiced rewriting vague statements into testable ones.

One teacher’s original: “Caffeine makes me better at studying.”

After revisions: “If I drink 100 mg of caffeine before a 20-minute practice quiz, then my score will be higher than when I drink water, because caffeine increases alertness.”

Not everyone was comfortable with how narrow the rewritten versions became.

“It feels like you’re shrinking the idea,” said high school English teacher Mark Liu, who attended to help students with research papers. “But then you can actually check it.”

Facilitators said that “shrinking” is how students learn to separate what they want to be true from what the evidence allows.

WHY IT MATTERS

In a shaded handout passed around the room, the workshop offered a blunt summary:

• Clear steps reduce confusion: Students can tell the difference between noticing, wondering, explaining and expecting.
• Falsifiability keeps claims honest: If a statement can’t be proven wrong, it can’t be tested, improved or corrected.
• Better predictions mean better experiments: Specific predictions help students choose what to measure and how to compare results.

Near the end of the session, Lee carried two cups of iced coffee to a small group of teachers and invited them to taste without looking.

A few guessed wrong about which had the small cubes.

“That’s the other lesson,” Patel said, watching the reactions. “The process isn’t about being right on the first try. It’s about building ideas that can survive a fair test—or fall apart cleanly when they don’t.”