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DOUG LLOYD: All right.

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So let's talk about a couple
of administrative details that

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may come in handy for you as you're
working through your CS50 problem sets

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and just taking the
course more generally.

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This course has a lot to teach you,
and so there's a lot of resources

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that we have available
so that you can make

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the most of this learning experience.

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These resources come in
many different types,

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and hopefully, will be available in
a form that will accommodate you.

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Here's a list of some of
the most common resources

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that students use when they're
working through their CS50 materials.

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On the course website, we have
all lecture materials right

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after they happen.

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So we have videos live-
streamed of lectures,

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if you're not able to attend lecture
a given week, videos for which

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are posted very shortly thereafter.

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On that site, on the
lecture part of the website,

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we also have sample code that
David shows during lecture,

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as well as the lecture
slides, scribe notes,

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which are taken by one
of our teaching fellows,

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so you don't have to take
notes in the classroom,

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as well as any links to
any external resources that

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are shared during lecture.

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>> We also have a wonderful function
reference, reference.cs50.net,

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which is usable for those less
comfortable and more comfortable alike.

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If you're familiar, the
function reference that we have,

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the CS50 reference, is an
annotated set of man pages--

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man pages is the shorthand way of
describing a manual page-- which

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is built into Linux
and gives programmers

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a reference to the functions
that they're using.

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>> Reference 50 has a reference for all
of the C standard library functions,

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and standard io.h and
others you'll become

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familiar with as the course goes on,
string.h, math.h, ctype.h, and so on.

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It's a great place to
go, if you're looking

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to see if there's a
function that exists,

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that will do what you
need to do, or if you're

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just unsure of how to use a function.

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>> We also have a great interactive
study guide at study.cs50.net.

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There, you'll find a variety of
topics with practice exercises,

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some additional section
slides, and lots more.

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It's a great place to
check out, if you're

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feeling a little uncomfortable
about at a particular topic.

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Chances are, there'll be
some exercises there for you

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to refine your skills a little bit.

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>> When Quiz 0 or Quiz 1 is coming up, you
can always see the past quizzes that

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we've given in the course
at cs50.harvard.edu/quizzes.

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All the old questions and answers
are there for your review.

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And they're a great
resource, especially as you

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consider what to put on the back or
front of your study sheet, the one

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piece of paper that you
get to bring into the exam.

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>> Additionally, there's lots of
resources on the CS50 problem sets,

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cs50.harvard.edu/psets.

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We post all the specifications
there, as well as any distribution

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code for the later problem sets.

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Additionally, incorporated into
the specifications themselves,

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you'll find friendly
walkthroughs from Zamila,

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who will be happy to guide you through
getting over the starting blocks that

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might trip you up as you start
working on the problem sets.

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And when the products sets are over,
Rob will be hosting postmortems

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where he deconstruct the
problem set, walks you

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through some possible
solutions after the fact.

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Of course, you can also always
find materials about sections,

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like these videos here, on
cs50.harvard.edu/sections.

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You'll also find a schedule of
sections, if you're on campus,

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as well as videos and slides that
are shared during the sections.

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A list of office hours are
available on the course website.

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If you're on the Cambridge
campus or on the Yale campus,

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or you're really anywhere, you can
find a list of our office hours, which

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are usually available weeknights.

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>> And for help from your
peers or with your peers,

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you can go to cs50.harvard.edu/discuss.

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It's our asynchronous discussion forum,
sort of similar in spirit to Piazza,

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if you're familiar with Piazza,
which you might see in other courses.

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It's an asynchronous bulletin
board where you can ask a question

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and, after a little while, get an answer
from a teaching assistant, or teaching

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fellow, or even your fellow students.

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We in fact, strongly encourage you to,
if you know the answer to a question

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that a fellow student asks, feel
free to help him out a little bit.

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>> Now, if you're taking the course through
CS50x and not taking it on campus,

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we also have the course
archives available at cs50.tv.

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All of the resources
I just described are

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available on cs50.tv, organized by year.

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At the end of every fall, all the
past years resources will be there.

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So you can feel free to check those
out to see other ways of presenting

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material in CS50 years past.

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>> Additionally, we have a
wealth of online resources

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that are not localized
to Harvard or Yale.

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You can go to our Slack, our
asynchronous chat service,

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at cs50x.slack.com.

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We also have a forum on Stack
Exchange and on Reddit, both of which

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are listed here.

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You can tag us on Twitter
at @cs50, or with #cs50.

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And on course, you can
also find us on Facebook.

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>> One other administrative bit that
I want to touch on now, grading.

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So as you're probably familiar,
assignments in this course

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are graded on four different axes.

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We grade you on scope,
would asks the question,

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did you make an earnest effort
to complete the problem set?

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Did you try all the parts?

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Correctness, does your code work?

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Is it free of bugs?

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Does it have the expected
output, given a set of inputs?

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Design is the third axis.

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And it asks the question,
how efficient is your code?

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How well-written is it?

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And finally, style, which gets
to the question of how human

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readable is your code, which is very
important for your teaching fellows.

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>> Now, as a general
rule, I usually present

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this graph for what these scores mean.

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All of these axes are graded
on a scale of zero to five.

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And generally, you want to be in
the three, four, or five range

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in all of the axes.

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It's OK to be in the one or two range
a little bit, particularly early

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on the course, but it's an area you
generally don't want to stay in.

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You definitely don't want to be getting
zeros in any aspect of the problem set,

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because that's going to
lower your overall grade.

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Now, we also have some tools
available for you to help bring up

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your score in some of these areas.

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So we have check50.

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Each problem set specification
will include a reference

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to how to use check50 for
that particular problem.

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And you can use check50 to help
you improve your correctness score,

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by finding out which test cases
your program might not be passing.

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>> We also have style50, which
is another command line tool.

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You are also taught how to use it as
part of each problem set specification.

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And you can use style50 to get guidance
on how to improve your program style,

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to make it cleaner, easier to read,
and hopefully boost your style score.

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Lastly, your teaching
fellow will provide you

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with qualitative comment-based feedback
to help you improve your design score.

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Design is a little tricky
to grade automatically,

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unlike correctness and
style which can easily

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be tested with a command line tool.

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Rather, your design
score will probably be

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most improved by getting feedback
from your teaching fellow

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in the way of comments.

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Scope, of course, we leave
to you to actually try

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all the parts of the problem set.

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>> I'm Doug Lloyd.

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This is CS50.

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