CS 61A: Structure and Interpretation of Computer Programs

Fall 2026, UC Berkeley

Upcoming

• Due Mon 9/28 Project 2 Computer Aided Typing Software checkpoint
• Due Fri 10/2 Project 2 Computer Aided Typing Software (1 bonus point for submitting by Thu 10/1)

← Previous Announcements Next →

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 14Linked Lists QUIZ 3Recursion Lab 4Objects (due Wed 9/30)	Videos YouTube
Wed, Sep 30	Lecture 15Trees Discussion 5Trees
Fri, Oct 02	Lecture 16Midterm 2 Review 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 17Problem Solving Lab 5Recursive Data (due Wed 10/7)
Wed, Oct 07	Lecture 18Debugging
Fri, Oct 09	Lecture 19Mutation Homework 5Mutation (due Thu 10/15)

Week 8

Mon, Oct 12	Lecture 20Classes 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)
Wed, Oct 14	Lecture 21Inheritance Discussion 6Classes
Fri, Oct 16	Lecture 22Lazy Evaluation Homework 6Classes (due Thu 10/22)

Week 9

Mon, Oct 19	Lecture 23Generators QUIZ 5Mutation Lab 7Lazy Evaluation (due Wed 10/21)
Wed, Oct 21	Lecture 24Efficiency Discussion 7Generators
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
Fri, Nov 06	Exam Midterm 2 Retake 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)