04:46

Social Studies

Why does February only have 28 days?

Lesson duration 04:46

4,731,564 Views

09:44

Social Studies

Ruby Bridges: The child who defied a mob and desegregated her school

Lesson duration 09:44

481,561 Views

02:19

Social Studies

Why do we celebrate Groundhog Day?

Lesson duration 02:19

3,283,325 Views

09:13

Social Studies

The massacre of Tulsa's "Black Wall Street"

Lesson duration 09:13

4,915,164 Views

05:08

Psychology

Stay in - or leave - a relationship?

Lesson duration 05:08

3,385,679 Views

06:13

Science & Technology

How to clear icy roads, with science

Lesson duration 06:13

197,039 Views

48:39

Social Studies

Letter from Birmingham Jail - Martin Luther King, Jr.

Lesson duration 48:39

759,992 Views

03:24

Health

How much sleep do you actually need?

Lesson duration 03:24

11,555,105 Views

04:19

Physical Fitness

What happens to your body when you start exercising regularly

Lesson duration 04:19

9,503,902 Views

02:53

Teaching & Education

Why we should draw more (and photograph less)

Lesson duration 02:53

386,820 Views

04:42

Emotional Health

An Exercise in Self Compassion

Lesson duration 04:42

2,588,233 Views

02:38

Health

The science of laziness

Lesson duration 02:38

8,134,791 Views

05:15

Science & Technology

What happens when nature goes viral?

Lesson duration 05:15

1,698,774 Views

03:14

Thinking & Learning

The amazing effects of gratitude

Lesson duration 03:14

414,190 Views

12:26

Social Studies

When is Thanksgiving?

Lesson duration 12:26

5,888,133 Views

03:33

Physical Science

Why 350°F is the magic number for baking

Lesson duration 03:33

1,300,750 Views

07:39

Environmental Science

Where do your online returns go? - Aparna Mehta

Lesson duration 07:39

84,815 Views

06:15

Social Studies

Do we own the land?

Lesson duration 06:15

538,325 Views

03:57

Social Studies

Black Friday: An accident of history

Lesson duration 03:57

519,332 Views

05:37

Design, Engineering & Technology

The environmental cost of free two-day shipping

Lesson duration 05:37

1,340,877 Views

06:32

Science & Technology

The taxonomy of candy

Lesson duration 06:32

280,146 Views

04:44

Science & Technology

The quest for the perfect apple

Lesson duration 04:44

568,931 Views

03:01

Science & Technology

The most horrifying parasites on the planet

Lesson duration 03:01

2,408,723 Views

03:28

Anthropology

Facts about pumpkins you never knew

Lesson duration 03:28

140,338 Views