Chemistry + Nutrition and Food
Measure the vitamin C in fruit juices
Titrate juices with iodine and starch to compare how much vitamin C each contains.
- Intermediate
- 1 day
- Under 250
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Behavioural Economics + Psychology
Test the anchoring effect on price estimates
Show two groups a high or low number first and compare their estimates of an unrelated price.
- Intermediate
- 2–7 days
- Free
Behavioural and Cognitive Science + Graphic and UI/UX Design
Test the usability of two apps or websites
Give five users the same three tasks on two competing apps and record time, errors and comments.
- Intermediate
- 1–2 weeks
- Free
Behavioural and Cognitive Science + Teaching and Learning
Compare study techniques with a memory test
Test whether self-quizzing beats rereading for remembering a passage a week later.
- Intermediate
- 1–2 weeks
- Free
Astronomy and Space + Pure Mathematics
Measure the Earth's circumference like Eratosthenes
Measure a stick's shadow at local noon in two cities and calculate the size of the Earth.
- Intermediate
- 1 day
- Free
Applied Mathematics + Behavioural Economics
Analyse a simple game with game theory
Play repeated prisoner's dilemma with classmates and compare what they do with the theory.
- Intermediate
- 2–7 days
- Free
Applied Mathematics + Physics
Derive and test the formula for a pendulum by dimensional analysis
Predict how period depends on length using only units, then confirm the power law with a log-log graph.
- Intermediate
- 1 day
- Under 250
Behavioural and Cognitive Science + Teaching and Learning
Test whether handwriting or typing helps note recall
Have two groups take notes on the same video by hand or by typing and test them later.
- Intermediate
- 1–2 weeks
- Free
Physics + Astronomy and Space
Estimate the Sun's power with a can of water
Measure how fast sunlight heats blackened water and estimate the solar constant.
- Intermediate
- 1 day
- Under 250
Biology + Environmental Science
Test how fertiliser runoff affects algae growth
Add different amounts of fertiliser to jars of pond water and track how green they turn.
- Intermediate
- 1–2 weeks
- Under 250
Languages and Linguistics + Artificial Intelligence
Compare human and computer translation
Translate ten sentences yourself and with a free online tool and classify the differences.
- Intermediate
- 2–7 days
- Free
Behavioural and Cognitive Science + Behavioural Economics
Study how choices change with the way they are presented
Give two groups the same choice worded as a gain or as a loss and compare what they pick.
- Intermediate
- 2–7 days
- Free
Materials, Energy and Other Branches + Chemistry
Study corrosion protection for steel
Compare paint, oil, zinc coating and sacrificial protection on steel in salt water.
- Intermediate
- 2–4 weeks
- 250–500
Behavioural and Cognitive Science + Nutrition and Food
Study how nudges on a plate change eating
Change where fruit is placed in the canteen and count whether more people choose it.
- Intermediate
- 1–2 weeks
- Under 250
Crops, Soil and Horticulture + Biology
Study hydroponics against soil growing
Grow leafy plants in a simple water-based system and in soil and compare growth and water use.
- Intermediate
- 2–4 weeks
- 500–1,000
Music, Theatre and Writing + Physics
Analyse the mathematics and physics of a musical scale
Measure the frequency of each note of a scale and find the ratios between them.
- Intermediate
- 2–7 days
- Free
Aerospace Engineering + Physics
Measure the thrust of a water rocket
Build a static test stand and measure thrust against time for different water fills.
- Intermediate
- 1–2 weeks
- 250–500
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