CSAwesome

by Beryl Hoffman and Barbara Ericson

Published by CSAwesome

Computer ScienceAP

Free, interactive AP Computer Science A curriculum using Java, endorsed by the College Board and aligned with the new AP CSA standards for 2025–2026.

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Attribution

CSAwesome by Beryl Hoffman and Barbara Ericson, published on GitHub under CC BY-NC-SA 4.0 (https://creativecommons.org/licenses/by-nc-sa/4.0/). Access the original for free at https://github.com/bhoffman0/CSAwesome2.

230 pages in 11 modules. Sign up to read and adopt them.

0Getting Started9 pages
1. Welcome to CSAwesome
2. Preface
3. About the AP CSA Exam
4. Transitioning from AP CSP to AP CSA
5. Java Development Environments
6. Growth Mindset and Pair Programming
7. Short PD Pretest
8. Pretest for the AP CSA Exam
9. Survey
1Using Objects and Methods30 pages
1. 1.1Introduction to Algorithms, Programming, and Compilers
2. 1.2Variables and Data Types
3. 1.3Expressions and Output
4. 1.4Assignment and Input
5. 1.5Casting and Ranges of Values
6. 1.6Compound Assignment Operators
7. 1.7APIs and Libraries
8. 1.8Documentation with Comments and Preconditions
9. 1.9Method Signatures
10. 1.10Calling Class Methods
11. 1.11Using the Math Class
12. 1.12Objects - Instances of Classes
13. 1.13Creating and Initializing Objects: Constructors
14. 1.14Calling Instance Methods
15. 1.15Strings
16. Unit Summary 1a (1.1-1.6)
17. Toggle Code Practice 1a (1.1-1.6)
18. Coding Practice 1a (1.1-1.6)
19. Multiple Choice Exercises for Unit 1a (1.1-1.6)
20. Unit Summary 1b (1.7-1.15)
21. Toggle Code Practice 1b (1.7-1.15)
22. Coding Practice 1b (1.7-1.15)
23. Multiple Choice Exercises for Unit 1b (1.9-1.15)
24. Practice Test for Objects (1.12-1.14)
25. Java Swing GUIs (optional)
26. Unit 1 Free Response Question (FRQ) Practice
27. Unit 1A Projects
28. Unit 1B Projects
29. Mixed Up Code Practice 1a (1.1-1.6)
30. Mixed Up Code Practice 1b (1.7-1.15)
2Selection and Iteration34 pages
1. 2.1Algorithms with Selection and Repetition
2. 2.2Boolean Expressions
3. 2.3if Statements
4. 2.4Nested if Statements
5. 2.5Compound Boolean Expressions
6. 2.6Comparing Boolean Expressions (De Morgan’s Laws)
7. 2.7While Loops
8. 2.8For Loops
9. 2.9Implementing Selection and Iteration Algorithms
10. 2.10Implementing String Algorithms
11. 2.11Nested Iteration
12. 2.12Informal Runtime Analysis of Loops
13. Unit 2 Part 1 Summary on Selection (2.1-2.6)
14. Selection Toggle Code Practice (2.1-2.6)
15. Selection Coding Practice (2.1-2.6)
16. Selection Multiple Choice Exercises (2.1-2.6)
17. Selection Free Response Question (FRQ) Game Practice (2.1-2.6)
18. FRQ Style Selection Coding Practice (2.1-2.6)
19. Group Work - Remainder Operator (%)
20. Unit 2 Part 2 Summary on Loops (2.7-2.12)
21. Loops Toggle Code Practice (2.7-2.12)
22. Loops Coding Practice (2.7-2.12)
23. Loops Multiple Choice Exercises (2.7-2.12)
24. Unit 2 Test
25. FRQ 1 MessageBuilder with Loops and Strings
26. FRQ APCalendar for Loops and Control Structures
27. FRQ Self Divisor A
28. FRQ String Scramble A
29. Magpie Chatbot Lab
30. Consumer Review Lab
31. Unit 2A Projects
32. Unit 2B Projects
33. Selection Mixed Up Code Practice (2.1-2.6)
34. Loops Mixed Up Code Practice (2.7-2.12)
3Class Creation22 pages
1. 3.1Abstraction and Program Design
2. 3.2Impact of Program Design
3. 3.3Anatomy of a Java Class
4. 3.4Writing Constructors
5. 3.5Methods: How to Write Them
6. 3.6Methods: Passing and Returning References of an Object
7. 3.7Class (static) Variables and Methods
8. 3.8Scope and Access
9. 3.9this Keyword
10. Unit 3 Summary
11. Toggle Code Practice 3 (3.4-3.9)
12. Unit 3 Mixed Up Code Practice
13. Unit 3 Write Code Practice for Classes
14. Multiple-Choice Exercises - Objects and Classes
15. Unit 3 Test
16. Free Response Question (FRQ) 2 Class Design - CupcakeMachine Class
17. FRQ 2 Practice with Classes
18. Free Response Question (FRQ) - StepTracker Class
19. Free Response Question - Time
20. College Board Labs
21. Design a Class for your Community Project
22. Unit 3 Projects
4Data Collections76 pages
1. 4.1Ethical and Social Issues Around Data Collection
2. 4.2Data Sets
3. 4.3Array Creation and Access
4. 4.4Array Traversals
5. 4.5Implementing Array Algorithms
6. 4.6Using Text Files
7. 4.7Wrapper Classes - Integer and Double
8. 4.8ArrayList and its Methods
9. 4.9ArrayList Traversals
10. 4.10Implementing ArrayList Algorithms
11. 4.112D Array Creation and Access
12. 4.122D Array Traversals: Nested Loops
13. 4.13Implementing 2D Array Algorithms
14. 4.14Searching Algorithms
15. 4.15Sorting Algorithms
16. 4.16Recursion
17. 4.17Recursive Searching and Sorting
18. Unit 4A - Arrays Summary
19. Unit 4A - Toggle Code Practice 4a Arrays (4.1-4.6)
20. Unit 4A - Arrays Code Practice
21. Unit 4A - More Code Practice with Arrays
22. Unit 4A - Arrays Multiple-Choice Exercises
23. Unit 4A - Practice Exam for Arrays
24. Unit 4A - Free Response - Horse Barn A
25. Unit 4A - Free Response - Horse Barn B
26. Unit 4A - Free Response - Self Divisor B
27. Unit 4A - Free Response - Sound A
28. Unit 4A - Free Response - Sound B
29. Unit 4A - Free Response - Number Cube A
30. Unit 4A - Free Response - Number Cube B
31. Unit 4B - ArrayList Summary
32. Unit 4B - Toggle Code Practice 4b ArrayList (4.7-4.10)
33. Unit 4B - Code Practice with ArrayLists
34. Unit 4B - ArrayList Multiple-Choice Exercises
35. Unit 4B - Free Response Question (FRQ) 3 - ItemInventory
36. Unit 4B - Free Response - Climbing Club A
37. Unit 4B - Free Response - Climbing Club B
38. Unit 4B - Free Response - Climbing Club C
39. Unit 4B - Free Response - CookieOrder A
40. Unit 4B - Free Response - CookieOrder B
41. Unit 4B - Free Response - StringFormatter A
42. Unit 4B - Free Response - StringFormatter B
43. Unit 4B - Free Response - Delimiters A
44. Unit 4B - Free Response - Delimiters B
45. Unit 4D - Search/Sort Multiple-Choice Exercises
46. Unit 4C - 2D Arrays Summary
47. Unit 4C - Toggle Code Practice 4c 2D Arrays (4.11-4.13)
48. Unit 4C - Code Practice with 2D Arrays
49. Unit 4C - More Code Practice with 2D Arrays
50. Unit 4C - 2D Arrays Multiple-Choice Exercises
51. Unit 4C - Free Response Question (FRQ) 4 - Two-dimensional Arrays
52. Unit 4C - Free Response - Gray Image A
53. Unit 4C - Free Response - Gray Image B
54. Unit 4C - Free Response - Route Cipher A and B
55. Unit 4D - Recursion Summary
56. Unit 4D - Recursion Mixed Up Code Practice
57. Unit 4D - Recursion More Mixed Up Code Practice
58. Unit 4D - Code Practice for Recursion
59. Unit 4D - Recursion Exercises
60. Optional: HashMap (Dictionary) Data Structure
61. College Board Labs
62. Picture Lab for 2D Arrays
63. Picture Lab A1 - A3
64. Picture Lab A4: 2D Arrays in Java
65. Picture Lab A5: Picture Classes and Inheritance
66. Picture Lab A5: Modifying a Picture
67. Picture Lab A6: Mirroring Pictures
68. Picture Lab A7: Mirroring Part of a Picture
69. Picture Lab A8: Creating a Collage
70. Picture Lab A9: Simple Edge Detection
71. Unit 4A Projects
72. Unit 4B Projects
73. Unit 4C Projects
74. Unit 4A - Arrays Mixed Up Code Practice
75. Unit 4B - ArrayList Mixed Up Code Practice
76. Unit 4C - 2D Arrays Mixed Up Code Practice
5Inheritance (optional)15 pages
1. 5.1Inheritance, Superclass, Subclass
2. 5.2Inheritance and Constructors
3. 5.3Overriding Methods
4. 5.4super Keyword
5. 5.5Inheritance Hierarchies
6. 5.6Polymorphism
7. 5.7Object Superclass
8. Inheritance Summary
9. Free Response Questions
10. Mixed Up Code Practice
11. Code Practice with Object Oriented Concepts
12. Inheritance Multiple-Choice Exercises
13. College Board Celebrity Lab
14. Practice Exam - Inheritance (not timed)
15. Practice Exam - Inheritance (Timed)
6Untimed Practice Exams5 pages
1. Exam 1 for the AP CSA Exam (not timed)
2. Exam 2 for the AP CSA Exam (not timed)
3. Exam 3 for the AP CSA Exam (not timed)
4. Exam 4 for the AP CSA Exam (not timed)
5. Exam 5 for the AP CSA Exam (not timed)
7Timed Practice Exams4 pages
1. Practice Exam 1 for the AP CSA Exam
2. Practice Exam 2 for the AP CSA Exam
3. Practice Exam 3 for the AP CSA Exam
4. Practice Exam 4 for the AP CSA Exam
8Free Response Practice16 pages
1. FRQ 1A - Methods and Control - Part 1
2. FRQ 1A - Methods and Control - Part 2
3. FRQ 1A - Methods and Control - Part 3
4. FRQ 1B - Strings - Part 1
5. FRQ 1B - Strings - Part 2
6. FRQ 1B - Strings - Part 3
7. FRQ 2 - Class Design - Part 1
8. FRQ 2 - Class Design - Part 2
9. FRQ 2 - Class Design - Part 3
10. FRQ3 - ArrayLists - Part 1
11. FRQ3 - ArrayLists - Part 2
12. FRQ3 - ArrayLists - Part 3
13. FRQ4 - 2D Arrays - Part 1
14. FRQ4 - 2D Arrays - Part 2
15. FRQ4 - 2D Arrays - Part 3
16. 2018 AP Exam Free Response Questions
9Mixed Up Code - Free Response Practice4 pages
1. RandomStringChooser - Part A Parsons
2. RandomStringChooser - Part A
3. RandomStringChooser - Part B Parsons
4. RandomStringChooser - Part B
10Stories15 pages
1. Challenges In Computing
2. Anaya Taylor
3. Bryan Hickerson
4. Briceida Mariscal
5. Carla De Lira
6. Camille Mbayo
7. Destini Deinde-Smith
8. Eric Espinoza
9. Dr. Gloria Opoku-Boateng
10. Dr. Juan Gilbert
11. Luisa Morales
12. Lucas Vocos
13. Lien Diaz
14. Milly Rodriguez
15. Dr. Nettrice Gaskins

CSAwesome

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