CODEHS Cheat Sheet 2026

The 30 highest-yield CODEHS facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which of the following is the primary programming language used for developing Android apps? → Kotlin
2. Which of the following best describes machine learning? → A subset of AI where systems learn patterns from data without being explicitly programmed
3. A teacher suspects a student is using code from an online repository and claiming it as original work. What is the best first step? → Run the code through a plagiarism detection tool and review results
4. In Python, what does the `range(1, 10, 2)` call produce? → 1, 3, 5, 7, 9
5. What role does critical analysis play in understanding theory? → It enables deeper comprehension and the ability to evaluate and apply concepts
6. Which national organization publishes the K-12 Computer Science Framework that CodeHS aligns its curriculum to? → CSTA
7. What is the best approach when there is a language barrier with a client? → Use a qualified professional interpreter
8. A CodeHS teacher uses 'anchor activities' during class. What is the purpose of an anchor activity? → To provide meaningful independent work for students who finish tasks early
9. What does FERPA primarily protect? → Student education records and privacy
10. A CodeHS teacher wants to address chronic tardiness without escalating conflict. Which first-line strategy is MOST appropriate? → Have a private, non-confrontational conversation to identify the root cause
11. Which approach to behavior correction aligns with restorative practices in a high school CS classroom? → Private conversation focusing on impact and how to repair it
12. Which HTTP status code indicates a resource was not found on the server? → 404
13. Which concept is emphasized in CodeHS's data science curriculum track for high school students? → Analyzing real datasets to draw meaningful conclusions
14. Which of the following represents a UDL (Universal Design for Learning) principle that supports differentiation? → Providing multiple means of representation, action, and engagement
15. Which CodeHS feature helps teachers identify students who may be copying code from one another? → Code similarity/plagiarism detection in submissions
16. What is the primary goal of CodeHS's 'Intro to Computer Science' course at the high school level? → Introduce foundational programming and problem-solving skills
17. What is the purpose of reassessment in ongoing patient care? → To monitor treatment effectiveness and adjust the care plan
18. How should professionals handle technical difficulties with essential tools? → Have backup procedures in place and report issues through proper channels
19. Which file extension is typically associated with an Android application package? → .apk
20. How should a teacher handle discovering that two students submitted identical code on an individual assignment? → Follow the school's academic integrity policy and investigate before acting
21. Which assessment tool is most commonly used to evaluate cognitive function? → Mini-Mental State Examination (MMSE)
22. In CodeHS classroom management, what is the purpose of an 'exit ticket' at the end of a lesson? → To check for understanding and inform the next day's instruction
23. Which strategy helps prevent the 'expert student' dynamic where one group member does all the work in a CodeHS pair programming activity? → Rotate driver and navigator roles on a timed schedule
24. What is the benefit of using a 'parking lot' board in a CS classroom? → To capture off-topic or unanswered questions without derailing the lesson
25. Which strategy best addresses off-task device use during a CS lesson? → Use proximity, clear expectations, and monitor screens actively
26. Which HTML element is used to create a dropdown selection menu? →
27. Which student organization is commonly associated with CTE computer science pathways that CodeHS students may join? → CTSO such as FBLA or TSA
28. In CodeHS Python, what does the `len()` function return when called on a list? → The number of elements in the list
29. A CodeHS teacher wants to differentiate by interest. Which approach aligns with this strategy? → Allowing students to choose a coding project theme that appeals to them
30. Which behavior exemplifies academic integrity for a student using AI coding tools in a CodeHS course? → Using AI to understand concepts and then writing original code