http://edublogs.org/
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Edublogs lets you easily create & manage student & teacher blogs, quickly customize designs and include videos, photos & podcasts - it's safe, easy and secure.

Edmodo
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A wizard for creating and managing customized Google maps of address lists. Addresses come from your own Google spreadsheets. Modify your address list and maps are updated.
Keep them private or publish them and show them on any website.

Blogger
https://www.blogger.com/

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Share your thoughts, photos, and more with your friends and the world. It’s easy to post text, photos, and videos from the web or your mobile phone. Unlimited flexibility to personalize your blog with themes, gadgets, and more.
WordPress
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WordPress is a state-of-the-art publishing platform with a focus on aesthetics, web standards, and usability.
Kidblog
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Kidblog is designed for elementary and middle school teachers who want to provide each student with their own , unique blog. Kidsblog's simple, yet powerful tools allow students to publish posts and participate in discussions within a secure classroom blogging community. Teacher's maintain complete control over student blogs.