\label{Why_LON-CAPA} There are tens of learning management systems to choose from. Why should you choose LON-CAPA over the competition? \begin{itemize} \item \textbf{Unparalleled assessment engine}: The assessment engine in LON-CAPA is the beneficiary of over a decade of development and refinement. Few projects are even in the same league of the LON-CAPA project in experience with sophisticated homework problems. Sophisticated randomization features go well beyond merely randomizing the order of multiple choice problems; everything can be randomized, from the exact parameters in a given numerical problem to \emph{which} parameters are missing for a given student. See our Author's Manual for an idea of how powerful the assessment engine is (http://msu.loncapa.org/adm/help/author.manual.pdf), or try our Demo Course (http://demo.lon-capa.org/cgi-bin/signon.pl). Along with powerful online assessment, the randomization can be taken off-line as well. Customized exams can be printed for each student, taking full advantage of the randomization. Most of the usual forms of cheating on an exam are effectively impossible when each student gets a different exam. LON-CAPA integrates directly with some forms of scanning systems (and as long as you can get the input from the system in some manner, LON-CAPA can integrate with it with a little programmer support), and supports partial handgrading: An instructor or a TA can examine a single essay problem on an otherwise multiple-choice exam, and encode a score for the essay problem before sending the answer form for grading. \item mention development in an aggresive student cheating environment? Should probably be attached to pedagogical advantages, along with a mention of tens of thousands of students in the system. \item \textbf{Full course support}: LON-CAPA is capable of running your entire course from top to bottom. LON-CAPA can host all of the content of the course, from syllabuses to actual course materials. It can track your students grades, with as much power as you need. Want to give students bonuses for getting a problem right on the first try? Or insert external grades into the system from an external data source? Powerful communication features enable discussion between the instructors and students, or among the students themselves. From the initial course creation to the final grades readout, LON-CAPA has all the power you need to run courses. \item \textbf{It's free}\index{free}: The thousands or millions you save over expensive course management solutions can be better spent on computers, or directly spent on your students. LON-CAPA can frequently do more with less then some of the largest commercial competitors, too. \item \textbf{It's free}\index{free}: As in liberty. No need to buy an extra-special license just to have the privilege of developing extensions to the system. You have full access to the entire system. You aren't restricted to carefully delimited parts of the system the vendor deems {}``safe'' for you to access. You also have full access to all the data on the system; LON-CAPA never locks up your data. There aren't any hidden secrets in the system, either, when you're free to scrutinize all of the source code. And it won't become closed later either, thanks to the licensing. \item \textbf{Large Digital Library}: LON-CAPA's digital library means you have access to thousands of high-quality learning resources right off the bat, without writing them yourself. Since one of LON-CAPA driving motivations is resource sharing, you have full support for it at any granularity, from simply using other's freely available resource, to a multi-institution grant-funded large-scale collaboration project, to simply re-using content used last year in the same course. \item \textbf{Power for the Users}: LON-CAPA's grants a lot of power to the instructors to control their course; the system imposes minimal arbitrary restrictions on the instructors because the design is mature. To get an idea of what the instructors can do, see our Course Management Manual (http://msu.loncapa.org/adm/help/course.manual.pdf). \item \textbf{Improve Student's Performance}: Several studies have repeatedly shown that using LON-CAPA can significantly improve student performance. One especially interesting result has been its ability to nearly eliminate the gender gap in technical subjects such as physics, where men have traditionally outperformed women. \end{itemize}