The world is divided into invisible slices called time zones. As the Earth spins, the Sun rises on one slice after the next. There are 24 main slices, one for each hour of the day. Australia is so wide it has three of them all to itself.
When it's 9 in the morning in Sydney, it's 10 at night the day before in New York, and 11 at night in London. That sounds like time travel, but it's really just the planet turning. Sydney has already had its breakfast before some other places have even gone to bed.
Some of the first places on Earth to see each new day are tiny islands in the Pacific Ocean, just east of Australia. Then Australia. Then Asia. Then Europe. Then the Americas. The Sun chases its way around the world all day, every day.
Because Australia is so far east, classes there will be among the first in the world to start Earthrise:Live. When their school day ends, kids in Europe will only just be arriving at school. Together, our classrooms cover almost the whole 24 hours of the planet.