Welcome to Acadru

Pick Your Path.
Start Anywhere.

Challenges, quests, missions—your
learning journey, your choice.

Take the Discovery Quiz

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Pop Challenges

View all

10 min

50 XP

Bees Are Secret Engineers

The Hexagon Choice Explained

10 mins

50 XP

Bees Are Secret Engineers

The Hexagon Choice Explained

10 min

50 XP

The Shape That Builds Itself

How everything from broccoli to galaxies learns to repeat.

10 mins

50 XP

The Shape That Builds Itself

How everything from broccoli to galaxies learns to repeat.

15 min

75 XP

It’s Expensive to Be Poor

How flat taxes make the poor pay more.

15 mins

75 XP

It’s Expensive to Be Poor

How flat taxes make the poor pay more.

15 min

75 XP

The Graph That Exposes Inequality

How one curve reveals who really owns the world

15 mins

75 XP

The Graph That Exposes Inequality

How one curve reveals who really owns the world

15 min

100 XP

Clocks that Prove Time is Relative

The weaker the gravity, the faster the time.

15 mins

100 XP

Clocks that Prove Time is Relative

The weaker the gravity, the faster the time.

15 min

75 XP

The Madness of Precision

When microns make all the difference.

15 mins

75 XP

The Madness of Precision

When microns make all the difference.

10 min

50 XP

The Flaw of Capitalism

Why wealth grows faster than work.

10 mins

50 XP

The Flaw of Capitalism

Why wealth grows faster than work.

15 min

75 XP

The Flat Earth Illusion

You can’t flatten a sphere, but you can prove it beautifully.

15 mins

75 XP

The Flat Earth Illusion

You can’t flatten a sphere, but you can prove it beautifully.

15 min

100 XP

Crowd Quakes Aren’t Chaos

Physics Unlocks Rhythms of Massive Human Swarms

15 mins

100 XP

Crowd Quakes Aren’t Chaos

Physics Unlocks Rhythms of Massive Human Swarms

Fear This Bias: The Dunning–Kruger Effect

10 min

50 XP

Fear This Bias: The Dunning–Kruger Effect

When confidence rises faster than competence.

10 mins

50 XP

Fear This Bias: The Dunning–Kruger Effect

When confidence rises faster than competence.

15 min

75 XP

Food Is Losing Nutrition

What’s stripping the nutrients from the fruits and grains!

15 mins

75 XP

Food Is Losing Nutrition

What’s stripping the nutrients from the fruits and grains!

15 min

75 XP

A Soda Can Is a Design Masterpiece

The everyday object perfected by billions of trials.

15 mins

75 XP

A Soda Can Is a Design Masterpiece

The everyday object perfected by billions of trials.

15 min

50 XP

Diseases of the Poor Are Neglected

Why the world’s sickest get the least science

15 mins

50 XP

Diseases of the Poor Are Neglected

Why the world’s sickest get the least science

15 min

75 XP

Branded Drugs: The Gucci of Healthcare

When life-saving medicine gets a luxury price tag.

15 mins

75 XP

Branded Drugs: The Gucci of Healthcare

When life-saving medicine gets a luxury price tag.

10 min

50 XP

When Cars Forgot How to Roar

The psychology & design of bringing sound back to silence.

10 mins

50 XP

When Cars Forgot How to Roar

The psychology & design of bringing sound back to silence.

Alive at a Concert? Thank a Crowd Engineer

15 min

75 XP

Alive at a Concert? Thank a Crowd Engineer

How thousands move like one — design that prevents disaster

15 mins

75 XP

Alive at a Concert? Thank a Crowd Engineer

How thousands move like one — design that prevents disaster

15 min

75 XP

The Profitable Business of War

Who gets paid for the missiles?

15 mins

75 XP

The Profitable Business of War

Who gets paid for the missiles?

10 min

50 XP

Zoom Dysmorphia

Constant self-view on calls skews you

10 mins

50 XP

Zoom Dysmorphia

Constant self-view on calls skews you

15 min

75 XP

Frozen Needed a Snowflake Consultant

How science made Disney’s snow look real.

15 mins

75 XP

Frozen Needed a Snowflake Consultant

How science made Disney’s snow look real.

15 min

75 XP

Go Back to Your Country

How one classroom revealed the roots of racism.

15 mins

75 XP

Go Back to Your Country

How one classroom revealed the roots of racism.

Mini Quests

View all

Rescue the Elements

Hack the Table: One Table. Infinite Possibilities

View Quest

30 mins

500 XP

Invent Your Own Currency

Could your idea be the next Bitcoin?

View Quest

60 mins

750 XP

Fix Concrete’s Dirty Secret

Concrete is cracking the climate—can nature fix it?

View Quest

60 mins

700 XP

Stop the Next Collapse

When buildings fall, lives and dreams shatter.

View Quest

30 mins

500 XP

Fix the Resource Curse

Rich in Resources. Poor in Policy?

View Quest

30 mins

500 XP

Eco-Fakes Uncovered

Learn to spot deceptive marketing and demand real sustainability!

View Quest

30 mins

500 XP

Invent the Next Economic Index

Decode the economy’s weirdest signals

View Quest

30 mins

500 XP

Resist the Crowd Trap

When everyone stays silent, evil wins.

View Quest

30 mins

500 XP

Turbulence, Illustrated

What equations can’t solve… your art might reveal.

View Quest

30 mins

500 XP

Can You Prove Genocide?

Genocide is a legal word, not just a tragedy.

View Quest

30 mins

500 XP

Fix Turbulence with Nature

Can animal secrets help us beat chaotic wind?

View Quest

30 mins

500 XP

Fighting the Rising Seas

Spot the risks, and help rebuild our coastal cities!

View Quest

30 mins

500 XP

Hunt the Hidden Primes

Think primes are predictable? Hunt. Be Surprised.

View Quest

30 mins

500 XP

Outsmart the Time Thieves

Rescue your mind from infinite distraction.

View Quest

30 mins

500 XP

Space Weather Watchers

Can You Decode the Sun’s Secrets Before They Disrupt Earth?

View Quest

30 mins

500 XP

Pop Challenges

View all

10 min

50 XP

Bees Are Secret Engineers

The Hexagon Choice Explained

10 mins

50 XP

Bees Are Secret Engineers

The Hexagon Choice Explained

10 min

50 XP

The Shape That Builds Itself

How everything from broccoli to galaxies learns to repeat.

10 mins

50 XP

The Shape That Builds Itself

How everything from broccoli to galaxies learns to repeat.

15 min

75 XP

It’s Expensive to Be Poor

How flat taxes make the poor pay more.

15 mins

75 XP

It’s Expensive to Be Poor

How flat taxes make the poor pay more.

15 min

75 XP

The Graph That Exposes Inequality

How one curve reveals who really owns the world

15 mins

75 XP

The Graph That Exposes Inequality

How one curve reveals who really owns the world

15 min

100 XP

Clocks that Prove Time is Relative

The weaker the gravity, the faster the time.

15 mins

100 XP

Clocks that Prove Time is Relative

The weaker the gravity, the faster the time.

15 min

75 XP

The Madness of Precision

When microns make all the difference.

15 mins

75 XP

The Madness of Precision

When microns make all the difference.

10 min

50 XP

The Flaw of Capitalism

Why wealth grows faster than work.

10 mins

50 XP

The Flaw of Capitalism

Why wealth grows faster than work.

15 min

75 XP

The Flat Earth Illusion

You can’t flatten a sphere, but you can prove it beautifully.

15 mins

75 XP

The Flat Earth Illusion

You can’t flatten a sphere, but you can prove it beautifully.

15 min

100 XP

Crowd Quakes Aren’t Chaos

Physics Unlocks Rhythms of Massive Human Swarms

15 mins

100 XP

Crowd Quakes Aren’t Chaos

Physics Unlocks Rhythms of Massive Human Swarms

10 min

50 XP

Fear This Bias: The Dunning–Kruger Effect

When confidence rises faster than competence.

10 mins

50 XP

Fear This Bias: The Dunning–Kruger Effect

When confidence rises faster than competence.

15 min

75 XP

Food Is Losing Nutrition

What’s stripping the nutrients from the fruits and grains!

15 mins

75 XP

Food Is Losing Nutrition

What’s stripping the nutrients from the fruits and grains!

15 min

75 XP

A Soda Can Is a Design Masterpiece

The everyday object perfected by billions of trials.

15 mins

75 XP

A Soda Can Is a Design Masterpiece

The everyday object perfected by billions of trials.

15 min

50 XP

Diseases of the Poor Are Neglected

Why the world’s sickest get the least science

15 mins

50 XP

Diseases of the Poor Are Neglected

Why the world’s sickest get the least science

15 min

75 XP

Branded Drugs: The Gucci of Healthcare

When life-saving medicine gets a luxury price tag.

15 mins

75 XP

Branded Drugs: The Gucci of Healthcare

When life-saving medicine gets a luxury price tag.

10 min

50 XP

When Cars Forgot How to Roar

The psychology & design of bringing sound back to silence.

10 mins

50 XP

When Cars Forgot How to Roar

The psychology & design of bringing sound back to silence.

15 min

75 XP

Alive at a Concert? Thank a Crowd Engineer

How thousands move like one — design that prevents disaster

15 mins

75 XP

Alive at a Concert? Thank a Crowd Engineer

How thousands move like one — design that prevents disaster

15 min

75 XP

The Profitable Business of War

Who gets paid for the missiles?

15 mins

75 XP

The Profitable Business of War

Who gets paid for the missiles?

10 min

50 XP

Zoom Dysmorphia

Constant self-view on calls skews you

10 mins

50 XP

Zoom Dysmorphia

Constant self-view on calls skews you

15 min

75 XP

Frozen Needed a Snowflake Consultant

How science made Disney’s snow look real.

15 mins

75 XP

Frozen Needed a Snowflake Consultant

How science made Disney’s snow look real.

15 min

75 XP

Go Back to Your Country

How one classroom revealed the roots of racism.

15 mins

75 XP

Go Back to Your Country

How one classroom revealed the roots of racism.

Mini Quests

View all

Rescue the Elements

Hack the Table: One Table. Infinite Possibilities

View Quest

30 mins

500 XP

Invent Your Own Currency

Could your idea be the next Bitcoin?

View Quest

60 mins

750 XP

Fix Concrete’s Dirty Secret

Concrete is cracking the climate—can nature fix it?

View Quest

60 mins

700 XP

Stop the Next Collapse

When buildings fall, lives and dreams shatter.

View Quest

30 mins

500 XP

Fix the Resource Curse

Rich in Resources. Poor in Policy?

View Quest

30 mins

500 XP

Eco-Fakes Uncovered

Learn to spot deceptive marketing and demand real sustainability!

View Quest

30 mins

500 XP

Invent the Next Economic Index

Decode the economy’s weirdest signals

View Quest

30 mins

500 XP

Resist the Crowd Trap

When everyone stays silent, evil wins.

View Quest

30 mins

500 XP

Turbulence, Illustrated

What equations can’t solve… your art might reveal.

View Quest

30 mins

500 XP

Can You Prove Genocide?

Genocide is a legal word, not just a tragedy.

View Quest

30 mins

500 XP

Fix Turbulence with Nature

Can animal secrets help us beat chaotic wind?

View Quest

30 mins

500 XP

Fighting the Rising Seas

Spot the risks, and help rebuild our coastal cities!

View Quest

30 mins

500 XP

Hunt the Hidden Primes

Think primes are predictable? Hunt. Be Surprised.

View Quest

30 mins

500 XP

Outsmart the Time Thieves

Rescue your mind from infinite distraction.

View Quest

30 mins

500 XP

Space Weather Watchers

Can You Decode the Sun’s Secrets Before They Disrupt Earth?

View Quest

30 mins

500 XP

Pick Your Path. Start Anywhere.

Rescue the Elements

Invent Your Own Currency

Fix Concrete’s Dirty Secret

Stop the Next Collapse

Fix the Resource Curse

Eco-Fakes Uncovered

Invent the Next Economic Index

Resist the Crowd Trap

Turbulence, Illustrated

Can You Prove Genocide?

Fix Turbulence with Nature

Fighting the Rising Seas

Hunt the Hidden Primes

Outsmart the Time Thieves

Space Weather Watchers

Rescue the Elements

Invent Your Own Currency

Fix Concrete’s Dirty Secret

Stop the Next Collapse

Fix the Resource Curse

Eco-Fakes Uncovered

Invent the Next Economic Index

Resist the Crowd Trap

Turbulence, Illustrated

Can You Prove Genocide?

Fix Turbulence with Nature

Fighting the Rising Seas

Hunt the Hidden Primes

Outsmart the Time Thieves

Space Weather Watchers

Pick Your Path.
Start Anywhere.