1. Build the algorithm
Students arrange steps, choices and loops with blocks. They immediately see where their reasoning works or gets stuck.
Blocklyin the Classroom
Blockly in the Classroom is a browser learning environment where students build and test algorithms with blocks and JavaScript in Maze and Turtle.
How does it work?
Reason first, code afterwards.
Students first build with blocks. Then they can try the same solution in code. The reference sheet supports syntax, so the lesson can stay focused on reasoning, testing and improving.
2. Watch it run
Maze runs step by step. Turtle makes lines, angles and patterns visible on a grid.
3. Translate to code
Students who are ready with blocks try the same idea in JavaScript. Start small: functions, brackets, semicolons and lots of practice.
Components
From blocks to code
01
Maze
Mazes for sequence, counted loops, selection and conditional loops. Students immediately see whether their strategy works.
02
Turtle
Drawing with coordinates, angles and counted loops. Ideal for making code feel tangible.
03
Blocks and code
Each world has a block mode and a code mode. This makes the shift from clicking to typing calm and gradual.
04
Learning feedback
Messages name what went well and what the next small step could be.
05
Local progress
Work, attempts and completed levels are stored locally. No login, no dashboard, no fuss.
06
PDF export
With name, class, code, snapshot and rubric. Useful for review, feedback or a quick submission.
- Activities
- Maze and Turtle
- Progress
- Saved locally in the browser
- Export
- PDF with code and feedback
Place in the learning path
From platforms to projects.
The platforms build computational thinking. The projects use that thinking in a cross-curricular assignment in which students build, measure, test and conclude.
Platforms
STEaM projects
Smart Plants
Arduino, soil moisture, calibration and data.
Robotic hand
Arduino, sensors, servos and movement.
Wind
Micro:bit, energy, voltage and current.
Smart bin
AI, image recognition, data and microcontrollers.
Self-learning games
Getting started with machine learning
Particulate matter
Arduino, air quality, data and poster session.
For teachers
Practical for teachers.
Use this when you first want students to experience what an algorithm does. The environment is much more compact than JS in de Klas and Project Delphi. That is exactly why it can be used quickly in a lesson, study period or short differentiation activity.
- Suitable for students with little or no syntax experience.
- Useful for computational thinking lessons, STEM, differentiation and study periods.
- Clarifies programming concepts such as sequence, selection, conditional loops and counted loops.
- Connects to JS in de Klas and Delphi without an account system.
Learning platform and board book
Use the learning platform for the exercises. The board book is intended for whole-class use on the smartboard and shows the syllabus alongside the editor and simulator.
Privacy and licence
Privacy
This project does not use its own analytics or advertising cookies. Input, progress and results are processed in the browser and may be stored locally on the device. A download or export occurs only when the user initiates it. GitHub Pages logs visitors’ IP addresses for security purposes; external services are governed by their provider’s privacy policy.
License
Original project material by Robbe Wulgaert may be used, copied and adapted free of charge for education, provided that ‘Robbe Wulgaert – AI in de Klas’ is clearly displayed, where reasonably practical with a link to the original project. Commercial sale, paid distribution, sublicensing or repackaging as a commercial product is not permitted without prior written permission. Other uses outside education also require prior written permission. Third-party components remain subject to their own licences.