AUBURN — U.S. Cellular is bringing back its Calling All Teachers campaign for the first time since 2010 to donate $500,000 to help teachers fund projects to enhance their students’ learning experience.

The company is working with DonorsChoose.org and inviting teachers to post their projects on the site for potential funding. DonorsChoose.org is a philanthropic website that helps teachers find funds from corporate and individual donations for classroom projects.

Beginning Aug. 1, Maine public school teachers can register online at DonorsChoose.org, affiliate as a U.S. Cellular teacher, and then post their classroom projects. When the campaign was held in 2009 and 2010, U.S. Cellular donated a total of $2.1 million to fund more than 3,800 classroom projects, which included purchasing musical instruments, reading games, technology tools, and science experiments.

All projects must be submitted by Sept. 16 to be eligible for this funding.