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Google Classroom is a free blended learning platform developed by Google for educational institutions that aims to simplify creating, distributing, and grading assignments. The primary purpose of Google Classroom is to streamline the process of sharing files between teachers and students.

is as factually accurate as "Google Classroom is a free web service developed by Google for schools that aims to simplify creating, distributing, and grading assignments". Your suggestion doesn't encapsulate everything google classroom does. Posting assignments and grading them is clearly mentioned in other parts of the article.

File:Google Classroom icon.svg. Size of this PNG preview of this SVG file: 512 × 442 pixels. Other resolutions: 278 × 240 pixels | 556 × 480 pixels | 890 × 768 pixels | 1,186 × 1,024 pixels | 2,372 × 2,048 pixels. This is a file from the Wikimedia Commons. Information from its description page there is shown below.

Google for Education is a service from Google that provides independently customizable versions of several Google products using a domain name provided by the customer. It features several Web applications with similar functionality to traditional office suites, including Gmail, Hangouts, Meet, Google Calendar, Drive, Docs, Sheets, Slides, Groups, News, Play, Sites, and Vault.

From Wikipedia, the free encyclopedia ClassDojo is an educational technology company. It connects primary school teachers, students and families through communication features, such as a feed for photos and videos from the school day, and messaging that can be translated into more than 35 languages.