Topic title: Python GUI
Year group: 9
When taught: January to April
What are we learning?
At the end of this unit all pupils should be able to:
• Use Tkinter to create a basic graphical user interface (GUI)
• Design and implement buttons, labels, and an entry/display box in a window
• Write and link functions to button clicks (e.g., click(), calculate(), clear())
• Perform simple calculations (+, -, ×, ÷) using Python
• Use string concatenation and conversion (e.g., to evaluate expressions)
• Test and debug their calculator to make sure it works as expected
Most pupils will be able to:
• Organise their code into reusable functions and avoid repetition
• Implement and use advanced functions (e.g., square, square root)
• Use Tkinter layout tools (e.g., grid, row/column settings) to neatly arrange buttons
• Design a user-friendly interface with readable labels and a clear layout
• Explain how their program works and how each function contributes to the final output
Some pupils will be able to:
• Extend the calculator with extra features (e.g., %, π, memory recall, +/- toggle)
• Use input validation and add error handling for invalid calculations (e.g., divide by zero)
• Apply event-driven programming principles effectively
• Create a professional-looking interface using custom fonts, colours, and styling
• Evaluate their own and others’ calculators and suggest improvements for functionality or design
• Package the program for distribution using tools like pyinstaller or create a GUI menu system
Why is this important to know?
Learning Skills:
• Synthesis: Pupils will bring ideas together and create solutions to coding problems
• Problem solving when deciding how to solve a problem and why
Life Skills:
• Collaboration: on complex moral and ethical issues in computing
• Resilience: when debugging code in a text-based language
ICT Skills:
• Software: Using integrated development environments (IDEs) to code programs
• Using tutorials
• Split screen working
Literacy Skills:
• Digital literacy: Coding using text-based languages
• Vocabulary: Learning new vocab and learning how it links to other subjects (variable and integer)
Where does this link into our past and future learning?
Pupils are expected to have had some previous experience of Python programming, including basic inputs and outputs, converting inputs to numbers using the int() function, selection (if-elif-else
statements) and while loops. This unit follows on from the Year 8 topic –Python Next Steps.
Future learning topic: GCSE Computer Science – Algorithms and Programming
How will we be assessed on this topic?
• Pupils’ will code using an IDE and send a link as evidence of correct running code
What makes a strong piece of work in this topic?
• The calculator looks professional: clear layout, well-aligned buttons, and readable display.
• All basic operations work correctly (+, -, ×, ÷) using button functions.
• Code includes separate functions for click, calculate, and clear, promoting organisation.
• Additional functions like square and square root are implemented and functional.
• Extension buttons (e.g., %, π, memory, etc.) are added creatively and work correctly.
• The code is well-commented, tidy, and uses meaningful function and variable names.
• The student has tested and debugged the program to ensure it runs smoothly without crashing.
What are teachers hoping to see?
• A working, complete GUI built with Tkinter – all buttons and labels function as intended.
• Effective use of functions to organise code into smaller, reusable parts.
• Confident use of event-driven programming (e.g., responding to button clicks).
• Logical structure in code, avoiding repeated code through use of loops or helper functions.
• A user-friendly interface – design matters just as much as functionality.
• The ability to debug and fix errors independently, showing resilience.
• Students thinking like software developers – testing, refining, and improving their programs.
What key words are there in this topic?
What can I try if I want to stretch and challenge myself on this topic?
• Add more advanced functions: percentage, π, memory recall (M+, M-, MR), or exponential (^).
• Use keyboard input alongside buttons for faster interaction.
• Add a history display showing previous calculations.
• Style your calculator with custom fonts, colours, and layout using tkinter.ttk or stylesheets.
• Create a scientific calculator mode with toggles for more complex operations.
• Add error handling for invalid inputs (like dividing by zero or empty calculations).
• Package your calculator into an executable file (.exe or .app) using pyinstaller.
• Research Tkinter frames or grid layouts to improve structure and responsiveness
What wider reading can be done on this topic?
• CGP KS3 Computing Complete Revision & Practice
• Hodder Compute-IT: Student’s Book 1 – Computing for KS3
• Magazines Direct – The Python Book (10th Edition)
• PGOnline – Learning to Code in Python
What websites are linked to the topic?
• BBC Bitesize (Intro to Programming): https://www.bbc.co.uk/bitesize/guides/zts8d2p/revision/1
• Website used for coding: https://replit.com
• Website used for tutorials: https://www.w3schools.com/python/default.asp
• Website to help theory: https://www.bbc.co.uk/bitesize/topics/zhy39j6
Careers
• Applications developer
• Big data engineer
• Cyber security analyst
• Data scientist
• Database administrator
• Forensic computer analyst
• Game designer/developer
• Information systems manager
• IT consultant
• Network engineer
• Software engineer
• Systems analyst
• UX designer
• Web designer
• Web developer
Extra Skills:
• Communication
• Teamwork
• Problem-solving
• Time management
• Organisation
• Software Skills
Progression:
• Online tutorials
• GCHQ/Bebras competitions
• Coding clubs
• GCSE Computer Science
• A-level Computer Science
• University/Apprenticeship
• Work experience
