Curriculum map

Learn in small, connected steps

Read OCR ERL, write Python and revisit key ideas as you move through J277 programming.

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Output

2.2.1

Make a program communicate clearly using exact text and numeric output.

Unit overview

Printing textavailable · 18 min Printing numbersavailable · 17 min

Variables

2.2.1

Store values with meaningful names, then change them as a program runs.

Unit overview

Creating variablesavailable · 22 min Updating variablesavailable · 21 min

Input

2.2.1

Receive data from a user, store it, and respond with personalised output.

Unit overview

Getting user inputavailable · 19 min Combining input and outputavailable · 22 min

Data types & casting

2.2.2

Choose suitable data types and convert input before using it in calculations.

Unit overview

Strings and integersavailable · 20 min Converting input into numbersavailable · 24 min

Arithmetic

2.2.1

Follow program sequence and calculate with arithmetic operators, DIV, MOD and powers.

Unit overview

Sequence and arithmetic operatorsavailable · 23 min DIV, MOD and useful patternsavailable · 24 min Powers, order and incrementingavailable · 25 min

Selection

2.2.1

Make decisions with Boolean expressions, if statements, nested selection and switch/case.

Unit overview

Boolean expressions and comparisonsavailable · 24 min If, elseif and elseavailable · 26 min Nested selection and precedenceavailable · 27 min Switch and caseavailable · 24 min

Iteration

2.2.1

Repeat instructions with count-controlled and condition-controlled loops.

Unit overview

For loopsavailable · 24 min Range and stepavailable · 23 min While loopsavailable · 25 min Do-until and input loopsavailable · 26 min Counters and accumulatorsavailable · 27 min Nested loopsavailable · 27 min

Strings & arrays

2.2.3

Manipulate text and process one- and two-dimensional collections.

Unit overview

Concatenation, length and caseavailable · 25 min Indexing and substringsavailable · 27 min ASC and CHRavailable · 22 min One-dimensional arraysavailable · 27 min Looping through 1D arraysavailable · 28 min Two-dimensional arraysavailable · 29 min

Procedures & functions

2.2.3

Break programs into reusable subroutines with parameters, returned values and clear scope.

Unit overview

Defining and calling proceduresavailable · 25 min Using parametersavailable · 27 min Functions and returned valuesavailable · 28 min Local and global variablesavailable · 28 min Passing and returning arraysavailable · 31 min

Robust programs

2.3 + 2.2.3

Anticipate misuse, validate and test data, handle files and solve complete procedural problems.

Unit overview

Defensive design and authenticationavailable · 27 min Range validation with loopsavailable · 29 min Presence, length, type and format checksavailable · 31 min Syntax, runtime and logic errorsavailable · 30 min Test data and test plansavailable · 29 min Reading and writing filesavailable · 32 min Random integer generationavailable · 27 min Decomposition and complete solutionsavailable · 40 min