How I Use It
Having used other Learning Management Systems or LMSs before, Schoology is a great option for having an online or digital classroom environment (you can use the web version or the apps for iOS and Android). There is a free version and a paid version, and the free version has a ton of features that any teacher could find useful for an online presence: discussion boards, badges, gradebook, announcements/updates, tests/quizzes, assignments, etc. You can organize online materials easily into folders, decide when items are "visible" to students, get and give immediate feedback on assessments, grade using rubrics, align to standards, and collect digital work. You can also invite parents to be part of your classroom by giving them a code for his/her student. One of the best things about it is the ease with which you can share with others -- great for collaboration with teacher teams or PLCs.
Overall, this is probably the best LMS I've used. It's very easy to use and scales nicely for K-12. Having apps available for both iOS & Android in addition to the web version makes it a very flexible tool, especially for classrooms with mixed devices. Being able to differentiate for student groups is a great feature, and the different ways students can interact digitally is powerful. The teachers I've worked with love it -- it's extremely intuitive, so you don't need a ton of PD to get started. The paid version has more features (obviously), but the free version has plenty of great stuff for the teacher who wants to explore blended, flipped, or online learning.