Thank you, Tracey, and welcome everyone. It has been an exciting first half of 2018 and we are thrilled to report another great quarter. And as a result, we are once again raising our guidance for the full year. We outlined three key priorities for the year. Meeting our financial goals, expanding our TAM, and adding new capabilities that leverage reach, our student graph and the strength of the Chegg brand. Our team has stayed focused on executing against these priorities, and in a moment Andy will you walk you through our financial results in greater detail. In Q2, we delivered outstanding growth across our business, reaching 32% total revenue growth year-over-year and 38% Chegg Services growth driven by 45% subscriber growth. As our number suggest, the power of the Chegg brand is at an all time and we enter the fall semester with significant momentum. Chegg Study remains the center of our flywheel and we continue to expand the depth and breadth of the content capabilities we offer students, which expands both the TAM and the engagement. In Q2, we increased our catalogue of textbook solutions to over 30,000 ISBNs and our library of proprietary, expert answers and solutions is now nearly 24 million, an increase of 42% year-over-year. And students seem to be valuing Chegg Study more than ever, as evidenced by an increase in usage. We had over 315 million Chegg Study content views in the first half of the year, which is up 60% year-over-year. We believe the more content and modalities that we add, the more popular and indispensable Chegg will become We will continue to invest in ways to create greater value for our students, as we have with our writing service. Writing is one of the most underserved areas in education, with 75% of high school seniors lacking proficiency in writing competencies. We are already providing help to students in this category and we have over 100 million annual visits to our writing sites and 130 million citations were added in Q2 of this year. We have always had the view that technology can speed up the process of citing sources and creating bibliographies but, more importantly, we believe that technology can be used to teach people how to write. Our acquisition of WriteLab, an A.I.-enabled writing platform, which we announced in Q2, allows us to provide more personalized writing tools to students, helping address their specific pain points and academic challenges for grammar, sentence structure, writing style, and more. This accelerates our ability to take students from citing to writing. And as powerful as A.I. technology is, we know that every one of our services is enhanced when it is backed by integrated expert human help. Students continue to validate our strategy as over 60% of our Tutor customers come from other services across the Chegg platform. In addition, we have learned that students prefer chat-based tutoring, versus live video-based tutoring. So, we continue to re-architect our system to build more capabilities, allowing more students and tutors to leverage chat, enabling us to provide high quality, personalized tutoring at a very low cost. Math is another subject area where students struggle. As 33% of high school graduates in the U.S. lack basic math skills and 64% of students are unprepared for college-level math. To meet this need, in June we launched a desktop version of the Chegg Math Solver subscription. This service helps students understand math by providing guided, step-by-step explanations to help them learn difficult concepts in subjects like pre-algebra, pre-calculus, calculus, and linear algebra. It is designed to increase comprehension and understanding of the subject matter and accelerate learning in high school and college. We will continue to increase the number of subjects we cover in the months and years ahead, and plan to expand from the current desktop service to mobile in the back half of this year. With the addition of math to our growing suite of Chegg Services, we have started testing our first bundle, the Chegg Study Pack, which we anticipate launching in the fall of 2019. This combines Chegg Study, with Math Solver and EasyBib Plus, our math and writing subscriptions, into a single subscription offering. Students will have access to all three services, for the first time, seamlessly integrated and for a substantial discount. Students trust Chegg to provide services that help them master their academic experience and we feel that we are in the very early stages of services we can provide to help students to improve their outcomes. As such, we will continue to expand the products and services we offer when we see an opportunity to address key pain points. Our most recent example is our exciting acquisition of StudyBlue. And, in that spirit, we couldn't be more thrilled to add StudyBlue to the Chegg family of services, as research shows that 37% of students are using flashcards to accelerate their learning online. Our vision is to make our flash tools the most comprehensive and easy-to-use study tools. With nearly 500 million pieces of user-generated content already, we plan to grow that and pair it with the professional content including content that is currently available on Chegg. We believe this will create the most useful and robust free flashcard service available. By making it free, we expand our funnel deeper in to high school and the college market and open up more opportunities to serve students around the world. Even as we continue to expand in the learning space, we know that 85% of all students say they go to college to get a better job. So, we are investing in our CareerMatch platform which utilizes our reach and our proprietary data to help match students to the best job opportunities for them. We just expanded our beta test, which will enable us to learn and adapt the services even better to the demands of both students and employers. Chegg reaches a huge and valuable audience, which has led more brands to approach us to find creative and impactful ways to connect with students. The extension of our partnership with Sallie Mae is one such example. We will now be able to offer the Study Starter benefit, which gives borrowers with new Sallie Mae Smart Option Student Loan or a Sallie Mae Parent Loan, access to a suite of study support services from Chegg platform and now for the next three years. As we look to the future, our team's passion for our mission is at an all-time high. For the first time in Chegg's history, we participated in the Great Place to Work Survey and, thanks to the responses of our employees; we were honored with the distinction of being certified as A Great Place to Work. By building a company that is committed to its mission, focused on putting students first, and leverages the talents of our employees to improve student outcomes, we have seen growth across our key business metrics while building a culture that attracts and retains top talent. We are incredibly optimistic about the path ahead of us. We see tremendous opportunity to utilize technology and the internet to transform learning, making it online, on-demand, personalized, adaptive, affordable, and backed by human help. Our goal is to accelerate the time it takes for a student to go from learning to earning. And we feel like we're just getting started. And with that, I will turn it over to Andy.