20 percent time is quite famous in Google company, which stands for each engineer needs to spend 20 % of working time to develop something he is interested in. Many amazing technical products were born in 20 percent time. For example, "Gmail," "Google News" and even the "Google" shuttle buses all started by 20% time. Since engineers have to focus on areas they intend to enter, they will exactly show as much as passion they can. Sometimes, "20 percent time may happen in making great changes throughout the organization. At this time, "grouplet will help staff to achieve the goal that a group of people with the same purpose may work together to convince others to accept the renewed idea. Within the "grouplet, engineers can discuss in a team, share different views as well as work on difficulties together to make great progress. For instance, the author began a "testing grouplet"  which advanced in better tools. During the 20 percent time , they have started brainstorming, then they moved to become "activists which devoted themselves to "building stuff . After many discussion and meetings, they eventually began to post episodes online to encourage the audience to know about, which unexpectedly turned into the company's culture. It's obvious that 20 percent time  can really promote a persons motivation and productivity in company, especially while working in a team that members can share the same passion and idea. All in all, give engineers room, give them 20 percent time to be self-directive, creative and productive. 20 percent time cannot only be effective to engineers at Google, but also is useful to students. According to Von Jan, school should every day supports students to spend 20% time to work on their business in order to be more intelligent. Because she finds that students definitely need extra free time to appreciate interesting things and unpredictable discoveries which may help themselves to be more crea