2D lists challenge
Lesson details
Learning outcome
I can create a game using two-dimensional lists.
Key learning points
- A two-dimensional list allows you to hold a list as one element.
- Data in a 2D list can be held in rows and columns.
- A 2D list can be used to create a game board.
Keywords
Two-dimensional - a list or array that has both columns and rows of values
Subroutine - a sequence of instructions with an identifiable name that performs a specific task
Common misconception
You cannot print a game board or table layout neatly in Python.
You can added spaces and | to format a game board or table in Python.
Teacher tip
This lesson requires knowledge of coordinates of items in 2D arrays.
Equipment
Pupils will need access to a device that can edit and run Python programs. Examples in this lesson use the RPF Code Editor https://oak.link/python-editor
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.A 2D list is a list that contains other , allowing us to store data in a row and column format.
Q2.What will be the output of this subroutine?
1234def greet(name):
return "Hello, " + name + "!"
print(greet("Alice"))Code colourWhen programmers write code, they use a special tool called an IDE (Integrated Development Environment). In an IDE, different colours are used to help programmers understand the code:
- • Blue - numbers and boolean values
- • Green - strings
- • Purple - keywords
When programmers write code, they use a special tool called an IDE (Integrated Development Environment). In an IDE, different colours are used to help programmers understand the code:
- • Blue - numbers and boolean values
- • Green - strings
- • Purple - keywords
Q3.Match the concept to the definition
a collection of values stored in a single variable
a list that contains multiple lists inside it
a function or procedure that performs a task
Q4.Which of the following correctly defines a subroutine in Python?
Q5.What will be the output of the following code?
12my_list = [10, 20, 30, 40]
print(len(my_list))Code colourWhen programmers write code, they use a special tool called an IDE (Integrated Development Environment). In an IDE, different colours are used to help programmers understand the code:
- • Blue - numbers and boolean values
- • Green - strings
- • Purple - keywords
When programmers write code, they use a special tool called an IDE (Integrated Development Environment). In an IDE, different colours are used to help programmers understand the code:
- • Blue - numbers and boolean values
- • Green - strings
- • Purple - keywords
Q6.A list can contain mixed , e.g. [1, "hello", 3.14]
Assessment exit quiz
6 Questions
Q1.What is a two-dimensional list?
Q2.In Python, how would you access the element in the third row and second column of a 2D list named 'board'?
Q3.What is the purpose of the int() function when taking user input for coordinates in the game?
Q4.Which statement correctly updates the user_board by placing an ‘X’ in row 1, column 3?
Q5.A list is a list that contains other lists, allowing data to be organised in rows and columns.
Q6.What will be the output of the following code?
12grid = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
print(grid[1][2])Code colourWhen programmers write code, they use a special tool called an IDE (Integrated Development Environment). In an IDE, different colours are used to help programmers understand the code:
- • Blue - numbers and boolean values
- • Green - strings
- • Purple - keywords
When programmers write code, they use a special tool called an IDE (Integrated Development Environment). In an IDE, different colours are used to help programmers understand the code:
- • Blue - numbers and boolean values
- • Green - strings
- • Purple - keywords
To help you plan your 10 computer science lesson on: 2D lists challenge, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 10 computer science lesson on: 2D lists challenge, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 4 computer science lessons from the Programming: strings and lists unit, dive into the full secondary computer science curriculum, or learn more about lesson planning.