Events are run by Googlers, local Google Developer Groups or other developer meetups. Each event is a little different, but generally, an event can include a tech talk, series of code labs, and time for personal coding. Find one in your area or start your own!
If you're not able to find a nearby event don't worry! All the materials are available so you can organize your own event or work through the content at home. See the featured events section for more details.