Quizlet today announced milestones of 1 billion study sessions completed, with 100 million user-created study sets, and that it's used daily in every country in the world. Quizlet also announced it raised a $12 million Series A led by Union Square Ventures and Costanoa Venture Capital with participation from Altos Ventures and Owl Ventures.

Quizlet will use its funding to fuel its growth, hire, expand the product portfolio, build out internationally, and continue achieving its mission to build the most impactful digital learning tools. The company's traction demonstrates the need for learning tools that are learner-focused and curriculum agnostic. Beyond its use by traditional students, Quizlet is used by US diplomats preparing for language exams, Whole Foods employees memorizing food codes, and ski instructors preparing for their certifications.

'Quizlet is the most popular digital learning tool in the world because it is peer-powered and loved by its users,' said Andrew Sutherland, Quizlet CTO and Founder. 'We're proud that over 40 million people visit Quizlet every month to improve their performance as learners.'

The investor group assembled by Quizlet includes venture capital firms known for consumer Internet and mobile investing, software as a service (SaaS), education technology, and international expansion, all key aspects of Quizlet's long term plans. Fred Wilson from USV and Greg Sands from Costanoa will join Quizlet's board.

'I look at the education category on iOS and Android regularly to see how our education portfolio companies are doing. Every time I do that I see Quizlet at or near the top of that category. I've wanted to be an investor in Quizlet for a long long time, and I'm very pleased that it has come to pass,' said Fred Wilson, USV partner and Quizlet board member.

'This investment was about us being able to achieve our mission and make a real impact on education in the world today,' said Sutherland. 'We're grateful for the support from the Quizlet community so far and plan to only make the experience better.'

Quizlet continues to expand its product portfolio and today is launching two new products: Long Term Learning and Gravity. Long Term Learning provides daily study reminders, which automatically learn what students know and increase repetition for what they need to learn and is now available for Quizlet Plus users. Gravity converts quizzes into an Asteroids-like game to make learning more fun and is available for every Quizlet user on quizlet.com.

'We've added these new features because we believe learning doesn't happen unless it's easy and engaging. We have great future products planned and remain deeply committed to every tool helping learners improve their performance,' Sutherland said. 'It's an exciting time to be part of Quizlet.'

About Quizlet
Quizlet's study tools and applications are used by tens of millions of learners and teachers every day in every country of the world. Quizlet is easy, fun and powerful, and uses proven learning techniques benefiting learners and teachers worldwide. Quizlet was founded in 2005 and is based in San Francisco, California.