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About Data 100

Combining data, computation, and inferential thinking, data science is redefining how people and organizations solve challenging problems and understand their world. This intermediate level class bridges between Data 8 and upper division computer science and statistics courses as well as methods courses in other fields. In this class, we explore key areas of data science including question formulation, data collection and cleaning, visualization, statistical inference, predictive modeling, and decision making.​ Through a strong emphasis on data centric computing, quantitative critical thinking, and exploratory data analysis, this class covers key principles and techniques of data science. These include languages for transforming, querying and analyzing data; algorithms for machine learning methods including regression, classification and clustering; principles behind creating informative data visualizations; statistical concepts of measurement error and prediction; and techniques for scalable data processing.


  • Prepare students for advanced Berkeley courses in data-management, machine learning, and statistics, by providing the necessary foundation and context.
  • Enable students to start careers as data scientists by providing experience working with real-world data, tools, and techniques.
  • Empower students to apply computational and inferential thinking to address real-world problems.


While we are working to make this class widely accessible, we currently require the following (or equivalent) prerequisites. Prerequisites will be enforced in Data 100. It is your responsibility to know the material in the prerequisites. The instructors do not have the authority to waive these requirements. Undergraduates should fill out the Enrollment Exception Form managed by CDSS to request an exception.

  • Foundations of Data Science: Data 8 covers much of the material in Data 100 but at an introductory level. Data 8 provides basic exposure to python programming and working with tabular data as well as visualization, statistics, and machine learning.

  • Computing: The Structure and Interpretation of Computer Programs (CS 61A) or Computational Structures in Data Science (Data 88C). These courses provide additional background in python programming (e.g., for loops, lambdas, debugging, and complexity) that will enable Data 100 to focus more on the concepts in Data Science and less on the details of programming in python.

  • Math: Linear Algebra (Math 54, EECS 16A, Math 91, Math 110, or Stat 89A). We will need some basic concepts like linear operators, eigenvectors, derivatives, and integrals to enable statistical inference and derive new prediction algorithms. This may be satisfied concurrently to Data 100.

Please consult the Resources page for additional resources for reviewing prerequisite material.

Textbook: There is no official textbook for Data 100 this semester; we will provide course notes that will be released with the respective lectures.

Course Culture

Students taking Data C100 come from a wide range of backgrounds. We hope to foster an inclusive and safe learning environment based on curiosity rather than competition. All members of the course community — the instructors, students, and course staff — are expected to treat each other with courtesy and respect. Some of the responsibility for that lies with the staff, but a lot of it ultimately rests with you, the students.

Be Aware of Your Actions

Sometimes, the little things add up to creating an unwelcoming culture to some students. For example, you and a friend may think you are sharing in a private joke about other races, majors, genders, abilities, cultures, etc. but this can have adverse effects on classmates who overhear it. There is a great deal of research on something called “stereotype threat”: research finds that simply reminding someone that they belong to a particular culture or share a particular identity (on whatever dimension) can interfere with their course performance.

Stereotype threat works both ways: you can assume that a student will struggle based on who they appear to be, or you can assume that a student is doing great based on who they appear to be. Both are potentially harmful.

Bear in mind that diversity has many facets, some of which are not visible. Your classmates may have medical conditions (physical or mental), personal situations (financial, family, etc.), or interests that aren’t common to most students in the course. Another aspect of professionalism is avoiding comments that (likely unintentionally) put down colleagues for situations they cannot control. Bragging in open space that an assignment is easy or “crazy,” for example, can send subtle cues that discourage classmates who are dealing with issues that you can’t see. Please take care, so we can create a class in which all students feel supported and respected.

Be Respectful

Beyond the slips that many of us make unintentionally are a host of behaviors that the course staff, department, and university do not tolerate. These are generally classified under the term harassment; sexual harassment is a specific form that is governed by federal laws known as Title IX.

UC Berkeley’s Title IX website provides many resources for understanding the terms, procedures, and policies around harassment. Make sure you are aware enough of these issues to avoid crossing a line in your interactions with other students. For example, repeatedly asking another student out on a date after they have said no can cross this line.

Your reaction to this topic might be to laugh it off, or to make or think snide remarks about “political correctness” or jokes about consent or other things. You might think people just need to grow a thicker skin or learn to take a joke. This isn’t your decision to make. Research shows the consequences (emotional as well as physical) on people who experience harassment. When your behavior forces another student to focus on something other than their education, you have crossed a line. You have no right to take someone else’s education away from them.

Communicate Issues with Course Staff and/or the Department

We take all complaints about unprofessional or discriminatory behavior seriously. Professionalism and respect for diversity are not just matters between students; they also apply to how the course staff treat the students. The staff of this course will treat you in a way that respects our differences. However, despite our best efforts, we might slip up, hopefully inadvertently. If you are concerned about classroom environment issues created by the staff or overall class dynamic, please feel free to talk to us about it. The instructors in particular welcome any comments or concerns regarding conduct of the course and the staff. See below for how to best reach us.

From the Data Science Department: Data Science Undergraduate Studies faculty and staff are committed to creating a community where every person feels respected, included, and supported. We recognize that incidents may happen, sometimes unintentionally, that run counter to this goal. There are many things we can do to try to improve the climate for students, but we need to understand where the challenges lie. If you experience a remark, or disrespectful treatment, or if you feel you are being ignored, excluded or marginalized in a course or program-related activity, please speak up. Consider talking to your instructor, but you are also welcome to contact Executive Director Christina Teller at or report an incident anonymously through this online form.

As course staff, we are committed to creating a learning environment welcoming of all students that supports a diversity of thoughts, perspectives and experiences and respects your identities and backgrounds (including race, ethnicity, nationality, gender identity, socioeconomic class, sexual orientation, language, religion, ability, and more.) To help accomplish this:

  • If your name and/or pronouns differ from those that appear in your official records, please let us know.
  • If you feel like your performance in the class is being affected by your experiences outside of class (e.g., family matters, current events), please don’t hesitate to come and talk with us. We want to be resources for you.
  • We (like many people) are still in the process of learning about diverse perspectives and identities. If something was said in class (by anyone) that made you feel uncomfortable, please talk to us about it.
  • While the course staff understands that improving diversity, equity, and inclusion (DEI) are not enough to overcome systemic issues in academia such as racism, queerphobia, and other forms of discrimination and hatred, we also recognize the importance of DEI work.
  • If there are other resources you think we should list here, let us know!

Course Delivery

In keeping with departmental guidelines set by the Division of Computing, Data Science, and Society, all Data Science courses at Berkeley are offered fully in-person in Summer 2023. This summer’s offering of Data 100 will be taught solely in-person.

If you are unable to attend in-person discussion sections and office hours this summer, you are strongly encouraged to consider taking a different course. If you are unable to attend the in-person Midterm and Final, you cannot take Data 100 in Summer 2023.

Course Components

Below is a high-level “typical week in the course” for Summer 2023.

Mo Tu We Th Fr Sat
Office Hours Office Hours Office Hours Office Hours Office Hours  
Live Lecture Live Lecture Live Lecture Live Lecture    
Discussion Section   Discussion Section   Exam Prep/Catch-Up  
Homework due     Homework due    
          2 Labs due
  • All deadlines are subject to change.
  • Office Hours are scheduled on the Calendar page.
  • Lectures, discussions, assignments, projects, and exams are scheduled on the Home page.


There are 4 live lectures held Mondays to Thursdays, 5:00 pm - 6:30 pm, in-person in Li Ka Shing 245. All lecture recordings, slides, activities, and examples will be provided to the course website within 24 hours of the lecture.


Live discussion sections are one hour long sessions held twice weekly on Mondays and Wednesdays. The goal of these GSI-led sessions is to work through problems, hone your skills, and flesh out your understanding as part of a team. The problems that you solve and present as part of discussion are important in understanding course material.

The lectures, assignments, and exams of this course are structured with the expectation that all students attend discussion. The content covered in these sections is designed to solidify understanding of key lecture concepts and prepare students for homework assignments. It is to your benefit to actively participate in all discussions!

  • Discussion attendance will be recorded each week and account for 5% of the overall grade
  • All students are automatically granted 3 discussion drops to use for illness, personal emergencies, or other extenuating circumstances. These drops are designed to account for unexpected events – you should not plan to use them!
  • Attending the exam-prep session on Friday can replace either a missed Monday or a missed Wednesday section only for that specific week. Details about exam-prep sections will be released in the second week of classes.
  • Students with low discussion attendance scores may alternatively shift this 5% of the course grade onto their homework score. Course staff will automatically determine which grading policy will maximize your final grade in the course at the end of the semester.

You will be invited to share your timing preferences for discussions and assigned to a section in the first week of classes.

Homework and Projects

Homeworks are half-week-long assignments designed to help students develop an in-depth understanding of both the theoretical and practical aspects of ideas presented in lecture. Projects are week-long assignments (with a half-week checkpoint) that synthesize multiple topics. Typically, assignments will be due at 11:59 pm on Mondays and Thursdays.

  • All homeworks and projects must be submitted to Gradescope by their posted deadlines.
    • Each assignment will include detailed instructions on how to submit your work for grading. It is the student’s responsibility to read these carefully and ensure that their work is submitted correctly. Assignment accommodations will not be granted in cases where students have mis-submitted their work (for example, by submitting to the wrong portal, submitting only part of an assignment, forgetting to select pages, or failing to pass autograder tests)
  • Homeworks and projects have both visible and hidden autograder tests. The visible tests are mainly sanity checks. For example, a sanity check might verify that the answer you entered is a number as expected, and not a word. The hidden tests generally check for correctness, and are invisible to students while they are doing the assignment.
  • The primary form of support students will have for homeworks and projects are office hours and Ed.
  • Homeworks and projects must be completed individually. See the Collaboration Policy for more details.
  • See the Policies section for the submission grace period.


Labs are shorter programming assignments designed to give students familiarity with new ideas. They are meant to be completed prior to homework.

Two lab assignments will be released at the start of each week, covering content that will be presented in that week’s lectures. The first of these two assignments will cover the content presented in Monday’s and Tuesday’s lectures; the second will cover the content presented in Wednesday’s and Thursday’s lectures. Both weekly lab assignments are due at 11:59 pm on the Saturday of the corresponding week.

  • All lab assignments must be submitted to Gradescope by their posted deadlines.
  • All lab autograder tests are visible. Receiving full points on the autograder guarantees that you will be awarded full points on the lab assignment.
  • All lab assignments will be accompanied by a video walkthrough with explanations of key concepts. There will be no synchronous lab sections, however, students are welcome to bring questions about lab to office hours.
  • All labs are intended to take about an hour.


There will be two exams in this course:

  • Midterm on Thursday, July 20 5-7 PM.
  • Final on Thursday, August 10 5-7 PM.

All exams must be taken in-person. There will be one alternate final exam on August 10 6:30-8:30PM.

Office Hours and Communication

We want to enable everyone to succeed in this course. We encourage you to discuss course content with your friends, classmates, and course staff throughout the semester, particularly during office hours.

  • All office hours are listed on the Calendar.
  • GSI office hours will be held in Warren Hall 101B.
  • In general, students can come to GSI office hours for any questions on course assignments or material.
  • Instructor office hours are generally reserved for conceptual questions, course review, or course logistics.

Course Communication:

  • EdStem, or Ed for short, is our course forum this semester. The course is here. All course announcements will be through Ed. We are not using bCourses this semester. Please check out Ed or the FAQ page first before emailing course staff directly.

Ed is your primary platform for asking questions about the class. It is monitored daily by the entire course staff, so questions posted to Ed will likely receive the fastest response. If you need to discuss a more sensitive matter, the following emails are monitored by a smaller subset of the teaching team:


Grading Scheme

Category Percentage Details
Homeworks 25% Drop lowest
Projects 15% No drop
Labs 10% Drop 2 lowest scores
Discussion 5% Drop 3 lowest scores
Midterm Exam 15%  
Final Exam 30%  

Discussion attendance is expected for the summer session. Students with low discussion attendance scores may alternatively shift this 5% of the course grade onto their homework score, such that homework is worth 30% of the overall grade. Course staff will automatically apply whichever grading policy will maximize your final grade in the course at the end of the semester.

On-Time Submission

All assignments are due at 11:59 PM Pacific Time on the due date specified on the Home / Schedule page. The date and time of this deadline are firm. Submitting even a minute past is considered late.

Submitting by this “on-time” deadline earns an extra-credit on-time bonus, a 3% perk. This is available for homeworks, projects, and labs.

Grace Period

We recognize that life can be unexpected, and that you may face circumstances that prevent you from submitting your work by the posted deadline. In light of this, we offer a 1-day (24 hour) grace period for late submissions of homeworks, projects, and labs. Note that this grace period is designed to account for unexpected emergencies or assignment submission errors – you should not plan in advance to use it!

You can make a late submission after the on-time deadline and up to the end of the grace period. These late submissions are not penalized, but do not earn 3% the on-time bonus. You do not need to explicitly contact staff about late submissions; just submit directly to Gradescope within the listed grace period.

Submissions are not accepted beyond the grace period. The grace period is strictly enforced. We recommend thinking of the grace period as a backup, in case something unexpected comes up when aiming for the on-time deadline. As a result, getting an extension beyond the grace period will generally not be granted, except in rare, extraordinary emergencies (see the Extenuating Circumstances section).

All official communication will refer to the on-time deadline as the expected dates that you will submit assignments.

Extenuating Circumstances

We recognize that our students come from varied backgrounds and have widely-varying experiences. If you encounter extenuating circumstances at any time in the semester, please do not hesitate to let us know. The sooner we are made aware, the more options we have available to us to help you.

The Extenuating Circumstances Form is for any circumstances that cannot be resolved via the grace period policy above. Within two business days of filling out the form, a course staff will reach out to you and provide a space for conversation, as well as to arrange course/grading accommodations as necessary. For more information, please email

We recognize that at times, it can be difficult to manage your course performance — particularly in such a huge course, and particularly at Berkeley’s high standards. Sometimes emergencies just come up (personal health emergency, family emergency, etc.). Our Grace Period Policy combined with the Extenuating Circumstances Form is meant to lower the barrier to reaching out to us, as well as build your independence in managing your academic career long-term. So please do not hesitate to reach out.

Note that extenuating circumstances do not extend to logistical oversight, such as Datahub/Gradescope tests not passing, submitting only one portion of the homework, forgetting to save your notebook before exporting, submitting to the wrong assignment portal, or not properly tagging pages on Gradescope. It is the student’s responsibility to identify and resolve these issues in advance of the on-time deadline. We will not grant accommodations for these cases; instead, please use the grace period to cushion these submission errors.

DSP Accommodations

If you are registered with the Disabled Students’ Program (DSP) you can expect to receive an email from us during the first week of classes confirming your accommodations. Otherwise, email our support email. DSP students who receive approved assignment accommodations will have the 1-day grace period added to the approved extension to the on-time deadline. Please note that any extension, plus the grace period combined, cannot exceed 5 days. DSP students can submit assignment extension accommodation requests via the Extenuating Circumstances Form.

You are responsible for reasonable communication with course staff. If you make a request close to the deadline, we can not guarantee that you will receive a response before the deadline. Additionally, simply submitting a request does not guarantee you will receive an extension. Even if your work is incomplete, please submit before the deadline so you can receive credit for the work you did complete.

Regrade Requests

Students will be allowed to submit regrade requests for the autograded and written portions of assignments in cases in which the rubric was incorrectly applied or the autograder scored their submission incorrectly. Regrades for the written portions of assignments will be handled through Gradescope, and autograder regrades via a Google Form. The deadline for regrade requests (autograded and written) is one week after the grades are released for the corresponding assignment.

Always check that the autograder executes correctly! Gradescope will show you the output of the public tests, and you should see the same results as you did on DataHub. If you see a discrepancy, ensure that you have exported the assignment correctly and, if there is still an issue, post on Ed as soon as possible.

Regrade requests will not be considered in cases in which:

  • a student uploads the incorrect file to the autograder.
  • the autograder fails to execute and the student does not notify the course staff before the assignment deadline.
  • a student fails to save their notebook before exporting and uploads an old version to the autograder.
  • a situation arises in which the course staff cannot ensure that the student’s work was done before the assignment deadline.

Collaboration Policy and Academic Honesty

We will be following the EECS departmental policy on Academic Honesty, which states that using work or resources that are not your own or not permitted by the course may lead to disciplinary actions, including a failing grade in the course.

Assignments. Data science is a collaborative activity. While you may talk with others about the homework and projects, we ask that you write your solutions individually in your own words. If you do discuss the assignments with others please include their names at the top of your notebook. Restated, you and your friends are encouraged to discuss course content and approaches to problem-solving, but you are not allowed to share your code nor answers with other students, nor are you allowed to post your assignment solutions publicly. Doing so is considered academic misconduct. We will be running advanced plagiarism detection programs on all assignments. Use of AI-assisted methods, such as ChatGPT, to generate written or code solutions to assignments is prohibited.

Exams. Cheating on exams is a serious offense. We have methods of detecting cheating on exams – so don’t do it! Students caught cheating on any exam will fail this course.

Plagiarism on any assignment, as well as other violations to Berkeley’s Code of Conduct, will be reported to the Center for Student Conduct. The CSC treats most first-time offenses as a Non-Reportable Warning. Additionally we reserve the right to give you a negative full score (-100%) or lower on the assignments in question, an F in the course, or even dismissal from the university. It’s just not worth it!

Rather than copying someone else’s work, ask for help. You are not alone in Data 100! The entire staff is here to help you succeed. We expect that you will work with integrity and with respect for other members of the class, just as the course staff will work with integrity and with respect for you.

Finally, know that it’s normal to struggle. Berkeley has high standards, which is one of the reasons its degrees are valued. Everyone struggles, even though many try not to show it. Even if you don’t learn everything that’s being covered, you’ll be able to build on what you do learn, whereas if you cheat you’ll have nothing to build on. You aren’t expected to be perfect; it’s ok not to get an A.

Academic and Wellness Resources

Our Resources page lists not only course-specific academic resources such as course notes, past exams, study guides, and prerequisite review links, but also campus wellness resources on COVID-19, academic support, technology support, mental well-being, DSP accommodations, dispute resolution, social services, campus community, and basic needs. Our staff will also refer to this page when supporting you through this course.

We want you to succeed!

If you are feeling overwhelmed, visit our office hours and talk with us, or fill out the Extenuating Circumstances Form. We know college can be stressful and we want to help you succeed.

Important Note: We are committed to being a resource to you, but it is important to note that all members of the teaching staff for this course are responsible employees, meaning that we must disclose any incidents of sexual harassment or violence to campus authorities. If you would like to speak to a confidential advocate, please consider reaching out to the Berkeley PATH to Care Center.

Finally, the main goal of this course is that you should learn, and have a fantastic experience doing so. Please keep that goal in mind throughout the semester. Welcome to Data 100!


Academic Honesty policy and closing words adapted from Data 8. Course Culture inspired and adapted with permission from Dr. Sarah Chasins’ Fall 2021 CS 164 Syllabus and Grace O’Connell, the Asssociate Dean for Inclusive Excellence.