Common core aligned, leveled, cross-curricular informational texts (same article is written at 5 lexile levels) with quizzes. Students can highlight & annotate while reading passages online & teacher will see those annotations. Free teacher & student accounts, but all articles & quizzes are printable if you don't want students to use the online version.
Create assessments, quizzes, exams, surveys & polls. Take assessments from any computer or device (for example, a tablet) with an internet connection, or print them on paper automatically, even in multiple different versions. Questions can be scored automatically or manually.
Animated grammar instruction, videos, quizzes, games, books, etc. Free look at all noun activities, but access to all parts of speech requires subscription ($3.99/month, $19.99/year, $39.99 unlimited access forever). Common-core aligned. Similar to Schoolhouse Rock.
News articles for grades K-4, 5-8 and 9-12. Teacher can assign articles and corresponding quizzes.
How does it work? "Teachers register themselves and, after obtaining verifiable parental consent, register their students and associated class. Teachers assign user/screen names to students. TTribune populates passwords for each student user. Teachers then instruct their students to log on with the user name and password and read articles pre-selected by the Teacher. The Teacher encourages the students to post comments and may quiz the students on the material. Prior to any comment being posted, it is reviewed and approved by the Teacher. The Teacher can make edits and/or provide constructive feedback to the student that is only viewable to the student when he/she logs on. All quiz scores are delivered automatically to the Teachers to share with each student individually. With a student user account, students are only able to access their account, view the classroom page, Teacher instructions, review articles and provide comments. Students are not able to communicate directly with Teachers or other users."
A nice interactive site that steps you through the different parts of the Animal, Plant and Bacterial cells. After learning about the cells, students can play a game or take a quiz on what they've learned. Cool!