TED-Ed is TED’s youth and education initiative, and its signature content is TED-Ed Animations—short, award-winning animated videos about ideas that spark the curiosity of learners everywhere. Get started with this video about seasons of the year and how the shape of the Earth’s orbit and tilt of its axis affect the amount of sunlight each region of our planet receives. Then, continue exploring more videos on science, technology, civics, emotional health and more. Every video is accompanied by additional resources and extension activities.