CS 61A: Structure and Interpretation of Computer Programs

Fall 2026, UC Berkeley

Upcoming

Due Fri 10/16 Project 3 Ants Vs. SomeBees checkpoint 1
Due Wed 10/21 Project 3 Ants Vs. SomeBees checkpoint 2
Due Thu 10/22 Homework 6 Classes
Due Fri 10/23 Project 3 Ants Vs. SomeBees (1 bonus point for submitting by Thu 10/22)

Friday 10/16

Quiz 5 is on All Odd Sums from homework 5
- The entire quiz is available as a Practice Quiz on PrairieLearn
Ants checkpoint 1 due Friday 10/16
Midterm 2 Retakes will be 10/19-10/20 and 11/5-11/6
- Signups for 10/19-10/20 are open
Midterm 3 (45 points) is 8pm-10pm Tuesday 10/27 in various locations around campus
- Covers course content through Lecture 24: Efficiency on Wednesday 10/21
- You will receive a seat assignment the day before the exam

Wednesday 10/14

Homework 5 due Thursday 10/15
- Quiz 5 is on All Odd Sums
- We will release the entire quiz as a Practice Quiz on PrairieLearn tomorrow 10/15
Ants checkpoint 1 due Friday 10/16
Midterm 2 Retakes will be 10/19-10/20 and 11/5-11/6
- Signups for 10/19-10/20 open at 8am Friday 10/16

Monday 10/12

Entries to the completely optional Hog Strategy Contest are due 10/12
Homework 5 due Thursday 10/15
Quiz 4 is on Count Berries
- We released the entire quiz as a Practice Quiz on PrairieLearn

Friday 10/9

Midterm 2 (20 points) is this week (Mon 10/5 - Fri 10/9)
- Sign-ups are open
- We will provide electronic versions of the Midterm 1 and Midterm 2 study guides on the resources page.
- Practice midterm is on PrairieLearn.
- See the Ed post on midterm 2 exam logistics.
- You can miss one problem and still get a perfect score (more detail in this Ed post).
- Covers course content through Lecture 14: Linked Lists on Monday 9/28
Entries to the completely optional Hog Strategy Contest are due 10/12
Homework 5 due Thursday 10/15

Wednesday 10/7

Midterm 2 (20 points) is this week (Mon 10/5 - Fri 10/9)
- Sign-ups are open
- We will provide electronic versions of the Midterm 1 and Midterm 2 study guides on the resources page.
- Practice midterm is on PrairieLearn.
- See the Ed post on midterm 2 exam logistics.
- You can miss one problem and still get a perfect score (more detail in this Ed post).
- Covers course content through Lecture 14: Linked Lists on Monday 9/28
No discussion sections this Wed/Thurs/Fri.
Homework 4 due Thursday 10/8
Homework 5 was briefly released by mistake but will be updated shortly (sorry!)
Entries to the completely optional Hog Strategy Contest are due 10/12

Monday 10/5

Midterm 2 (20 points) is this week (Mon 10/5 - Fri 10/9)
- Sign-ups are open
- We will provide electronic versions of the Midterm 1 and Midterm 2 study guides on the resources page.
- Practice midterm is on PrairieLearn.
- See the Ed post on midterm 2 exam logistics.
- You can miss one problem and still get a perfect score.
- Covers course content through Lecture 14: Linked Lists on Monday 9/28
No discussion sections this Wed/Thurs/Fri.
Homework 4 due Thursday 10/8
Entries to the completely optional Hog Strategy Contest are due 10/12
- Special optional lecture Friday 10/2 1:10pm-2p in 1210 Gateway on how to win the contest.

Friday 10/2

Cats project due Friday 10/2
Midterm 2 (Mon 10/5 - Fri 10/9)
- Sign-ups are open
- We will provide electronic versions of the Midterm 1 and Midterm 2 study guides on the resources page.
- Practice midterm is on PrairieLearn.
- See the Ed post on midterm 2 exam logistics.
- Covers course content through Lecture 14: Linked Lists on Monday 9/28
Entries to the completely optional Hog Strategy Contest are due 10/12
- Special optional lecture Friday 10/2 1:10pm-2p in 1210 Gateway on how to win the contest.
John’s Friday 1pm office hours moved to Wheeler 224

Wednesday 9/30

Cats project due Friday 10/2
- Early submission bonus point for submitting by Thursday 10/1
Midterm 2 (Mon 10/5 - Fri 10/9)
- Sign-ups are open
- We will provide electronic versions of the Midterm 1 and Midterm 2 study guides on the resources page.
- Practice midterm will be posted tonight, Wednesday 9/30
- Covers course content through Lecture 14: Linked Lists on Monday 9/28
Entries to the completely optional Hog Strategy Contest are due 10/12
- Special optional lecture Friday 10/2 1:10pm-2p in 1210 Gateway on how to win the contest.

Monday 9/28

Quiz 3 is on Count Coins
- We released the entire quiz as a practice quiz on PrairieLearn
Cats project due Friday 10/2
- Checkpoint due Monday 9/28
- Early submission bonus point for submitting by Thursday 10/1
Midterm 2 (Mon 10/5 - Fri 10/9) sign-ups open at 6pm Monday 9/28
- Computer-based test using PrairieLearn held in the computer-based testing center
- Practice midterm and study guide will be available Wednesday 9/30
- Covers course content through Lecture 14: Linked Lists on Monday 9/28
- Questions may involve implementing functions and predicting output (What Would Python Display?)

Friday 9/25

Quiz 3 is on Count Coins
- We released the entire quiz as a practice quiz on PrairieLearn
- We will study a similar problem (count partitions) today in lecture
Cats project due Friday 10/2
- Checkpoint due next Monday 9/28
- Early submission bonus point for submitting by next Thursday 10/1
- There’s no homework due next week, just the project.

Wednesday 9/23

Homework 3 due Thursday 9/24
Cats project due Friday 10/2
- Checkpoint due next Monday 9/28
- Early submission bonus point for submitting by next Thursday 10/1
- There’s no homework due next week, just the project.

Monday 9/21

Submit Midterm 1 regrade requests on Gradescope by Tuesday 9/22.
Homework 3 due Thursday 9/24
Cats project due Friday 10/2
- Involves concepts from today & Wednesday
- Checkpoint due next Monday 9/28
- Early submission bonus point for submitting by next Thursday 10/1
- There’s no homework due next week, just the project.
Join exam-prep tutoring sections!
Quiz this week is on composite_identity from Homework 2.
- During the quiz, you’ll write code on the quiz page (not an in-browser VS Code).
- New: if you switch tabs before you submit or paste in the answer, you won’t pass the quiz!

Friday 9/18

Submit Midterm 1 regrade requests on Gradescope by next Tuesday 9/22.
Homework 3 due Thursday 9/24

Wednesday 9/16

Project 1: Hog (25 points) is due Thursday 9/17.
- Earn an early submission bonus point by completing the whole project by Wendesday 9/16
Look up, add, or change lab and discussion sections on sections.cs61a.org until today!
Submit Midterm 1 regrade requests on Gradescope by next Tuesday 9/22.
No more Zoom lectures after today, but you can watch recordings on bcourses

Monday 9/14

No lab on Monday 9/14 or Tuesday 9/15.
Midterm 1 (20 points) is 8pm-9pm Monday 9/14 in various locations around campus.
- You should have received a seat assignment; if not, email cs61a@berkeley.edu.
- Covers lectures 1-6 & textbook sections 1.1-1.6 (not including the Newton’s Method example)
- We provide the Midterm 1 study guide and scratch paper.
Project 1: Hog (25 points) is due Thursday 9/17.
- Earn an early submission bonus point by completing the whole project by Wendesday 9/16
Look up, add, or change lab and discussion sections on sections.cs61a.org until Wed 9/16.
Lecture Zoom link: berkeley.zoom.us/j/95687110890

Friday 9/11

Project 1: Hog (25 points) is due Thursday 9/17.
- Earn an early submission bonus point by completing the whole project by Wendesday 9/16
Midterm 1 (20 points) is 8pm-9pm Monday 9/14.
- Covers lectures 1-6 & textbook sections 1.1-1.6 (not including the Newton’s Method example)
- You will receive a seat assignment the day before the exam.
- We provide the Midterm 1 study guide and scratch paper.
- Fill out the alteration request form by Friday 9/11 to request any specific seating or accommodation.
Look up, add, or change lab and discussion sections on sections.cs61a.org until Wed 9/16.
Lecture Zoom link: berkeley.zoom.us/j/95687110890

Wednesday 9/9

Homework 2 (1 point) is due Thursday 9/10.
Project 1: Hog (25 points) is due Thursday 9/17.
- Earn the checkpoint (one point) by completing Phase 1 by Thursday 9/10.
- Earn an early submission bonus point by completing the whole project by Wendesday 9/16
Midterm 1 (20 points) is 8pm-9pm Monday 9/14.
- Covers lectures 1-6 & textbook sections 1.1-1.6 (not including the Newton’s Method example)
- You will receive a seat assignment the day before the exam.
- We provide the Midterm 1 study guide and scratch paper.
- Fill out the alteration request form by Friday 9/11 to request any specific seating or accommodation.
Look up, add, or change lab and discussion sections on sections.cs61a.org until Wed 9/16.
Lecture Zoom link: berkeley.zoom.us/j/95687110890

Friday 9/4

Quiz 1 is this Friday 9/4 & next Tuesday 9/8.
- Read the Quiz 1 Logistics Post on Ed.
- There’s a practice quiz
- If you can redo Homework 1 Question 4 (hailstone) without notes or AI, you can pass this quiz!
- Pass 5 out of 8 quizzes this semester for full quiz credit (10 points total).
Homework 2 (1 point) is due Thursday 9/10.
Project 1: Hog (25 points) is due Thursday 9/17.
- Earn the checkpoint (one point) by completing Phase 1 by Thursday 9/10.
- Earn an early submission bonus point by completing the whole project by Wendesday 9/16
Midterm 1 (20 points) is 8pm-9pm Monday 9/14.
- Covers lectures 1-6 & textbook sections 1.1-1.6 (not including the Newton’s Method example)
- You will receive a seat assignment the day before the exam.
Look up, add, or change lab and discussion sections on sections.cs61a.org until Wed 9/16.
Lecture Zoom link: berkeley.zoom.us/j/95687110890

Wednesday 9/2

Lecture Zoom link: berkeley.zoom.us/j/95687110890
Quiz 1 is this Friday 9/4 & next Tuesday 9/8.
- Read the Quiz 1 Logistics Post on Ed.
- If you can redo Homework 1 Question 4 (hailstone) without notes or AI, you can pass this quiz!
- Pass 5 out of 8 quizzes this semester for full quiz credit.
Look up, add, or change lab and discussion sections on sections.cs61a.org until Wed 9/16.
New course software (Preceptor, Provenance) is rapidly improving! Thanks for your patience. If you have problems, there’s a Software Issues Ed thread, or you can come to office hours.

Monday 8/31

Lecture Zoom link: berkeley.zoom.us/j/95687110890
Lab starts this week. Try to complete Lab 0 before you come. Turn in Lab 1 by 11:59pm Wednesday (preferably in lab).
Homework 1 is due Thursday.
If you need an extension, use flextensions.berkeley.edu/
Look up, add, or change lab and discussion sections on sections.cs61a.org.
Office hours start this week.
- John has extra office hours this week only 10am-12pm Tuesday in B1110 and by appointment.

Wednesday 8/26

Welcome to CS 61A!
Lecture Zoom link: berkeley.zoom.us/j/95687110890
Discussion starts this week.
Add or change lab and discussion sections: sections.cs61a.org
Come get help with Lab 0 in our drop-in office hours 10-12 Friday 8/28 in Gateway B1040.

Saturday 8/15

The summer 2026 site has been archived to cs61a.org/su26 and inst.eecs.berkeley.edu/~cs61a/su26 (@berkeley.edu login required).

Week 1

Wed, Aug 26	Lecture 1 Welcome (Slides) Discussion 0Getting Started Lab 0Getting Started (due Wed 9/2)
Fri, Aug 28	Lecture 2 Functions (Slides)(Examples) Homework 1Functions (due Thu 9/3)	Reading 1.1, 1.2, 1.3 Videos Askademia, YouTube

Week 2

Mon, Aug 31	Lecture 3 Control (Slides)(Examples) Lab 1Functions & Control (due Wed 9/2)	Reading 1.4, 1.5 Videos Askademia, YouTube
Wed, Sep 02	Lecture 4 Higher-Order Functions (Slides)(Examples) Discussion 1Control, Environment Diagrams	Reading 1.6 Videos Askademia, YouTube
Fri, Sep 04	Lecture 5 Environments (Slides) Homework 2Higher-Order Functions (due Thu 9/10) Project 1The Game of Hog (due Thu 9/17; checkpoint Thu 9/10)	Videos Askademia, YouTube

Week 3

Mon, Sep 07	Holiday
Tue, Sep 08	QUIZ 1Functions Lab 2Higher-Order Functions (due Wed 9/9)
Wed, Sep 09	Lecture 6 Abstraction (Slides)(Examples) Discussion 2Environment Diagrams, Higher-Order Functions	Videos Askademia, YouTube
Fri, Sep 11	Lecture 7 Function Examples (Slides)	Videos Askademia, YouTube

Week 4

Mon, Sep 14	Exam Midterm 1 (8pm-9pm) Lecture 8 Midterm 1 Review (Slides)(Examples)
Wed, Sep 16	Lecture 9 Recursion (Slides)(Examples) Discussion 3Recursion	Reading 1.7 Videos Askademia, YouTube
Fri, Sep 18	Lecture 10 Tree Recursion (Slides)(Examples) Homework 3Recursion (due Thu 9/24)	Videos Askademia, YouTube

Week 5

Mon, Sep 21	Lecture 11 Sequences (Slides)(Examples) QUIZ 2Higher-Order Functions Lab 3Lists (due Wed 9/23) Project 2Computer Aided Typing Software (due Fri 10/2; checkpoint Mon 9/28)	Reading 2.1, 2.2 Videos Askademia, YouTube
Wed, Sep 23	Lecture 12 Containers (Slides)(Examples) Discussion 4Tree Recursion	Videos YouTube
Fri, Sep 25	Lecture 13 Objects (Slides)(Examples)	Reading 2.3 Videos YouTube

Week 6

Mon, Sep 28	Lecture 14 Linked Lists (Slides)(Examples) QUIZ 3Recursion Lab 4Linked Lists (due Wed 9/30) ContestHog Strategy Contest (Optional) (due Mon 10/12)	Videos YouTube
Wed, Sep 30	Lecture 15 Trees (Slides)(Examples) Discussion 5Trees	Videos YouTube
Fri, Oct 02	Lecture 16 Midterm 2 Review (Slides) Homework 4Recursive Data (due Thu 10/8)

Week 7

Mon, Oct 05	Exam Midterm 2 (in the CBTF, Mon 10/5 - Fri 10/9) Lecture 17 Problem Solving (Slides)(Examples) Lab 5Trees (due Wed 10/7)
Wed, Oct 07	Lecture 18 Mutation (Slides)	Reading 2.4 Videos YouTube
Fri, Oct 09	Lecture 19 Classes (Slides)(Examples) Homework 5List Mutation (due Thu 10/15)	Reading 2.5 Videos YouTube

Week 8

Mon, Oct 12	Lecture 20 Attributes (Slides)(Examples) QUIZ 4Recursive Data Lab 6Mutation (due Wed 10/14) Project 3Ants Vs. SomeBees (due Fri 10/23; checkpoint 1 Fri 10/16; checkpoint 2 Wed 10/21)	Videos YouTube
Wed, Oct 14	Lecture 21 Inheritance (Slides)(Examples) Discussion 6Classes	Videos YouTube
Fri, Oct 16	Lecture 22 Iterators (Slides)(Examples) Homework 6Classes (due Thu 10/22)	Reading 2.8 Videos YouTube

Week 9

Mon, Oct 19	Lecture 23Generators QUIZ 5Mutation Lab 7Lazy Evaluation (due Wed 10/21)	Videos YouTube
Wed, Oct 21	Lecture 24Efficiency Discussion 7Generators	Reading 2.9
Fri, Oct 23	Lecture 25Object Examples

Week 10

Mon, Oct 26	Lecture 26Midterm 3 Review
Tue, Oct 27	Exam Midterm 3 (8pm-10pm)
Wed, Oct 28	Lecture 27Functional Programming Discussion 8Gleam
Fri, Oct 30	Lecture 28Algebraic Data Types Homework 7Gleam (due Thu 11/5)

Week 11

Mon, Nov 02	Lecture 29Immutable Data Lab 8Gleam Types (due Wed 11/4)
Wed, Nov 04	Lecture 30Interpreters Discussion 9Gleam Lists
Thu, Nov 05	Exam Midterm 2 Retake (in the CBTF, Thu 11/5 and Fri 11/6)
Fri, Nov 06	Lecture 31Coding Agents Homework 8Gleam Data (due Thu 11/12) Project 4Animator (due Mon 11/23; checkpoint Fri 11/13) Project 4Animator (TypeScript) (due Tue 12/1; checkpoint Fri 11/13)

Week 12

Mon, Nov 09	Lecture 32Browsers QUIZ 6Gleam Lab 9Coding Agents (due Wed 11/11)
Wed, Nov 11	Holiday Discussion 10Interpreters
Fri, Nov 13	Lecture 33Applications

Week 13

Mon, Nov 16	Lecture 34Tables QUIZ 7Gleam Data Lab 10SQL (due Wed 11/18)
Wed, Nov 18	Lecture 35SQL Discussion 11SQL
Fri, Nov 20	Lecture 36Aggregation Homework 9SQL (due Wed 11/25)

Week 14

Mon, Nov 23	Lecture 37Software Testing
Wed, Nov 25	Holiday
Fri, Nov 27	Holiday

Week 15

Mon, Nov 30	Lecture 38Software Tracing QUIZ 8SQL Lab 11Testing (due Wed 12/2)
Wed, Dec 02	Lecture 39Ethics Discussion 12Project 4 Presentations
Fri, Dec 04	Lecture 40Conclusion Homework 10Finale (due Sun 12/13)