Abstraction in Code: Functions and Program Design: Computer Science Unit 4, Grade 10 (Letters & Devotion)

Description

Abstraction in Code: Functions and Program Design is Unit 4 of Computer Science Principles: Computation, Data, and Society (Part 1) (Grade 10), the Letters & Devotion Computer Science course, complete in one printable PDF: 10 lessons, the unit check-up and the answer key, 90 pages.

• The function signature (name, parameters, return type by inference) as a contract separate from implementation
• Parameter passing and return value flow across a function call boundary
• Local vs. global scope and the bugs caused by conflating them
• Duplication in code as the signal that a function boundary belongs there
• Function definition with parameters and a return value, as a direct replacement for duplicated code
• Decomposition of a program into functions along its ‘natural’ task boundaries
• Tradeoffs between alternative function decompositions of the same program
• The four named function-related bug categories and their distinguishing symptoms
• Transfer of function-decomposition reasoning to an unfamiliar problem domain
• Full refactor of an unstructured program into a function-based design, plus a feature extension that tests whether the design supports change

Every lesson is written for a parent with no teaching background: it opens with a short script to read aloud, names the specific wrong idea a student is likely to reach for and how to correct it, and closes with a practice sheet you may copy for your household. Scripture references are King James Version throughout. Black-and-white, 8.5 x 11 in. The whole year of this course is also in this store as a single book.

AI note: The written content of this resource was drafted with AI tools, then reviewed and edited by the author.