? For the last two years, the world has been restricted to homes. Daily activities that couldn’t be managed without stepping out, came indoors all at once — from office to grocery shopping and schools. As the world accepts the new normal, News18 launches weekly classes for school children, explaining key chapters with examples from happenings around the world. While we try to simplify your subjects, a request to break down a topic can be tweeted @news18dotcom The earliest kind of print technology was introduction in China, Japan, and Korea. The uses of print became varied by the 17th century…