Students across the nation are participating in an international event to write at least one line of code

hour-codeMark Zuckerberg and Ashton Kutcher do it. This year, President Obama became the first president to do it.

What is it? Coding. This year’s Hour of Code, which takes place any time during Computer Science Education Week (Dec. 8-14), should reach even more students than it did last year, when 15 million students participated.

By 2020, there will be an estimated 1.4 million computing jobs for just 400,000 computer science students, according to Interest in computer science is dropping, and aims to change that with the Hour of Code.

School districts across the country signed up for the Hour of Code. Here’s a snapshot at what an Hour of Code looks like in each of those districts.

Students at Badin High School in Ohio participated in the Hour of Code event on Dec. 9. Badin delayed classes by an hour Tuesday so that every student could participate in the Hour of Code event, and it was a resounding success, said technology teacher David Gretz.

(Next page: What the Hour of Code looks like in districts across the country)