a.4.4 programming constructs
Control the flow. Master the big three constructs of sequence, selection, and iteration to tell your computer exactly what to do, when to do it, and how many times to repeat it.
If you can master just three concepts, you can write almost anything. Programming Constructs are the traffic signals of your code. First is Sequence: doing things in order, like a recipe. Second is Selection: making decisions using IF statements (e.g., "IF the player has 0 lives, THEN Game Over"). Finally, there’s Iteration: using loops to repeat boring tasks so you don't have to. Whether you're counting down a timer or checking a password, these three tools control the flow of every program ever written.
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This section outlines the progressive curriculum mapping for Programming Constructs, tracing the pedagogical journey from foundational linear sequencing and event-based selection in early years to advanced algorithmic control flow, such as recursion and exception handling. It explicitly bridges the gap between definite and indefinite iteration, ensuring students understand the mechanical difference between count-controlled and condition-controlled loops. By mandating the refactoring of nested logic into efficient structures at Key Stage 5, this strand ensures students evolve into sophisticated software engineers capable of managing complex, multi-layered cyclomatic complexity.
Last modified: March 20th, 2026
