In June, Google announced an online course for learning about how to become a Google power searcher. The course consisted of six free 50-minute classes with interactive activities and opportunities to connect with users using Google Groups and Google+.

Google announced today that the class is back for those who missed it the first time around. Those interested can now sign up. The series of classes begins on September 24 and lasts for two weeks.

“During the course’s first run in July, people told us how they not only liked learning about new features and more efficient ways to use Google, but they also enjoyed sharing tips and learning from one another through the forums and Hangouts,” says Dan Russell on the Google Research Blog. “Ninety-six percent of people who completed the course also said they liked the format and would be interested in taking similar courses, so we plan to offer a suite of upcoming courses in the coming months, including Advanced Power Searching.”

“You’ll learn about things like how to search by color, image, and time and how to solve harder trivia questions like our A Google a Day questions,” says Russell of the course.

If you want to learn how to build your own search engine, a Google engineer offers a different class for that.