Built for UK CS teachers

Teach coding.
Track every student.
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CodeBash is the coding platform for GCSE and A-Level Computer Science. Assign Python tasks, deliver AI-powered feedback and monitor class progress in real time.

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80%
Less marking time
KS3-A2
Curriculum aligned
17+
Free theory lessons
GDPR
Fully compliant

Everything a CS teacher needs in one place

From assigning the first Python task to producing the end-of-year report, CodeBash handles the overhead so you can focus on teaching.

AI Feedback
Personalised code feedback for every student, instantly.
Python Tasks
Curriculum-aligned tasks with automated test cases.
Class Management
Organise classes, assign work and manage cohorts.
Live Analytics
See exactly who is struggling before parents' evening.
GDPR Compliant
UK-hosted, fully compliant, no student data concerns.
Curriculum Aligned
Built for KS3, GCSE and A-Level specifications.

And it comes with a complete free theory library

Eleven complete theory series, 202 printable PDF worksheets, 11 unit exam papers and interactive tools. No login needed. Share with students, use in class, print and go.

Browse Free Theory
Understanding AI (6 lessons) Computer Systems (5 lessons) Data & Binary (6 lessons) Computer Networks (6 lessons) Cybersecurity (6 lessons) Ethics, Law & Environment (6 lessons) Software, Languages & Translators (6 lessons) Boolean Logic (3 lessons) Databases (4 lessons) Algorithms (8 lessons) Programming Fundamentals (10 lessons) 202 PDFs + 11 unit exams 35+ interactive tools No login required
More GCSE theory series are in development and will be added throughout 2025.
6 Lessons
Understanding AI

Rules vs learning, training data, classifiers, neural networks, ethics and large language models. For GCSE and A-Level CS.

18 worksheets
Unit exam paper
Activities + quiz
100% Free Start series
5 Lessons
Computer Systems

CPU architecture, the FDE cycle, memory, storage and performance. Worked examples and exam-style questions throughout.

18 worksheets
Unit exam paper
Calculation practice
100% Free Start series
6 Lessons
Software, Languages and Translators

System software, OS functions, utility programs, high and low level languages, compilers, interpreters and IDEs. The full software stack from boot to browser.

19 PDFs
Unit exam paper
Interactive activities
100% Free Start series
6 Lessons
Data & Binary

Binary, denary and hexadecimal. Character encoding, images, sound and compression. Place-value tools and conversion practice built in.

18 worksheets
Unit exam paper
6 interactive tools
100% Free Start series
6 Lessons
Computer Networks

LAN and WAN, topologies, wired and wireless, TCP/IP, the internet, cybersecurity and network security. Interactive tools throughout.

18 worksheets
Unit exam paper
Interactive tools
100% Free Start series
6 Lessons
Cybersecurity

Malware types, social engineering, technical attacks, encryption (symmetric and asymmetric), firewalls, network security, access control policies and layered defence. Includes encryption simulator, ransomware attack demo and real-world case studies.

18 worksheets
Unit exam paper
Interactive simulators
100% Free Start series
6 Lessons
Ethics, Law & Environment

Privacy and GDPR, UK legislation (Computer Misuse Act, DPA 2018, CDPA 1988), environmental impact, the digital divide, cultural and social effects, and open source licensing. Real-world and fictional case studies throughout.

18 worksheets
Unit exam paper
Case studies
100% Free Start series
3 Lessons
Boolean Logic

AND, OR and NOT gates, NAND, NOR and XOR, truth tables and full logic circuit analysis. Includes an interactive logic gate builder and Boolean algebra practice tool.

9 worksheets
Unit exam paper
Gate builder tool
100% Free Start series
4 Lessons
Databases

Flat-file vs relational databases, primary and foreign keys, ER diagrams, SQL queries and injection attacks. Includes a flat-file vs relational explorer and SQL injection demo tool.

12 worksheets
Unit exam paper
SQL tools
100% Free Start series
8 Lessons
Algorithms

Computational thinking, pseudocode and flowcharts, searching and sorting algorithms, and evaluating efficiency. Includes an AQA/OCR pseudocode toggle on every lesson.

24 worksheets
Unit exam paper
Pseudocode toggle
100% Free Start series
10 Lessons
Programming Fundamentals

Variables, data types, selection, iteration, lists, subroutines, file handling and exception handling. Python and C# toggle on every lesson with interactive tools.

30 worksheets
Unit exam paper
Python / C# toggle
100% Free Start series

What teachers and students say

CodeBash is a highly effective tool for supporting Python teaching. Pupils have found the platform intuitive to use and are motivated by the different test cases attached to each task. I was pleased to be able to create my own tasks, tailored to my way of teaching, and providing individual pupil feedback is quick and straightforward.

RD
R D'Cruz
Head of CS, St Albans School
Teacher

I am genuinely impressed with CodeBash. It is clear that a great deal of thought has gone into creating a truly teacher-centred platform. It streamlines workflow without compromising on depth or quality, which makes a real difference in day-to-day teaching. I would also like to highlight how responsive Eoin has been throughout. That level of support and openness to improvement speaks volumes about both the platform and the team behind it.

FH
F Hassan
Head of CS, SJI International
Teacher

I can see all my previous submissions and feedback in one place, which makes it much easier to improve. Filling out reflection sheets after assessments actually helps me understand what to work on next. My teacher even used the reporting tool at parents' evening, which made it really clear how I was progressing.

ST
Student
Eltham College
Student

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