Note-taking and memory platform Evernote announced this week that it was launching Sponsored Groups, a way for organizations, schools, and companies to purchase premium subscriptions for a group. Evernote subscribers still retain full control over their own notes; the sponsorship just means they're part of a group that gets their subscription paid for. There's an educational discount for those who qualify that'll take 50% off the normal $5 per month fee.

AllThingsD's Kara Swisher reported on Wednesday that textbook rental company Chegg has acquired Cramster, an online homework help website. Cramster offers help in all subject areas and since launching in 2003, has helped over 1 million students. This is the second acquisition this year for Chegg, having purchased the course scheduling company CourseRank this fall. Chegg also raised another round of investment this fall, bringing its total funding to an estimated $220 million.

Google has added a new filter option for its advanced search page that allows you to adjust results based on reading level. The options include "no reading level displayed," "annotate results with reading levels," "show only basic results," "show only intermediate results," and "show only advanced results.

Today concludes Computer Science Education Week. In its honor, I wrote another ReadWriteWeb story, with 4 (more) tools for teaching kids to code.