redi-intro-to-programming-2026

Intro to Programming

A cheerful laptop with code, Copenhagen buildings, and ReDI School colors

Welcome! Pick a lesson, open it in your browser, and start exploring.

Lessons

Choose a lesson below. Open the slides in your browser or download them as a PDF.

Lesson Description Slides
01 · Git and GitHub Learn about files, folders, and paths, then use Git, GitHub Desktop, and the terminal to save and share code. Open · PDF
02 · Variables and Data Types Learn about print(), variables, the four basic data types, type conversion, and reading user input. Open · PDF
03 · Arithmetic and User Input Learn arithmetic operators, order of operations, abs() and round(), reading keyboard input, and converting between types. Open · PDF
04 · Strings and Conditionals Learn string operations and methods, build output with f-strings, compare values and combine checks with and/or/not and in, then make decisions with if/elif/else, nesting, and conditional expressions. Open · PDF
Show slides with solutions These slides include the answers. Try the questions first! | Lesson | Slides with solutions | | --- | --- | | 01 · Git and GitHub | [Open](https://bazookamusic.github.io/redi-intro-to-programming-2026/slides_solutions/01-github-desktop.html) · [PDF](https://raw.githubusercontent.com/BazookaMusic/redi-intro-to-programming-2026/main/slides_solutions/01-github-desktop.pdf) | | 02 · Variables and Data Types | [Open](https://bazookamusic.github.io/redi-intro-to-programming-2026/slides_solutions/02-variables.html) · [PDF](https://raw.githubusercontent.com/BazookaMusic/redi-intro-to-programming-2026/main/slides_solutions/02-variables.pdf) | | 03 · Arithmetic and User Input | [Open](https://bazookamusic.github.io/redi-intro-to-programming-2026/slides_solutions/03-arithmetic.html) · [PDF](https://raw.githubusercontent.com/BazookaMusic/redi-intro-to-programming-2026/main/slides_solutions/03-arithmetic.pdf) | | 04 · Strings and Conditionals | [Open](https://bazookamusic.github.io/redi-intro-to-programming-2026/slides_solutions/04-strings-and-conditionals.html) · [PDF](https://raw.githubusercontent.com/BazookaMusic/redi-intro-to-programming-2026/main/slides_solutions/04-strings-and-conditionals.pdf) |

Exercises

Lesson 01’s exercises are in one README. From Lesson 02, each exercise folder has exercise.py for your code and check.py to check your answer. To run a Python exercise, follow How to clone this repository to get access to exercises, then How to do exercises and check my answers.

Lesson Exercises
01 · Git and GitHub Open exercises
02 · Variables and Data Types Open exercises
03 · Arithmetic and User Input Open exercises
Show exercise solutions These folders contain the answers. Try the exercises first! | Lesson | Solutions | | --- | --- | | 01 · Git and GitHub | [Open solutions](https://github.com/BazookaMusic/redi-intro-to-programming-2026/blob/main/solutions/01-git-and-github/README.md) | | 02 · Variables and Data Types | [Open solutions](https://github.com/BazookaMusic/redi-intro-to-programming-2026/tree/main/solutions/02-variables-and-data-types) | | 03 · Arithmetic and User Input | [Open solutions](https://github.com/BazookaMusic/redi-intro-to-programming-2026/tree/main/solutions/03-arithmetic-and-user-input) |

Tutorials

Click a tutorial title to expand it and see the instructions.

How to clone this repository to get access to exercises You need [Git](https://git-scm.com/downloads) to copy the repository. ### Open a terminal On Windows, open **Start**, search for **PowerShell**, and press Enter. On macOS, open **Applications → Utilities → Terminal**. A terminal is where you type commands. Type the commands below one line at a time. Press **Enter** after each line to run it, and wait for it to finish before typing the next line. Text after `#` is a note for you; the terminal ignores it. ### Make a folder in Documents On Windows (PowerShell): ```powershell cd "$HOME\Documents" # Go to Documents mkdir "ReDI Projects" # Make a new folder cd "ReDI Projects" # Go into the new folder ``` On macOS: ```sh cd "$HOME/Documents" # Go to Documents mkdir "ReDI Projects" # Make a new folder cd "ReDI Projects" # Go into the new folder ``` If `ReDI Projects` already exists, skip the `mkdir` command. If Windows cannot find Documents, open it in File Explorer and use its full path in quotes for the first `cd` command. ### Clone the repository In your new `ReDI Projects` folder, run these commands on either computer: ```sh git clone https://github.com/BazookaMusic/redi-intro-to-programming-2026.git # Copy the repository cd redi-intro-to-programming-2026 # Go into the copied folder ``` You now have a copy of the repository in Documents → ReDI Projects.
How to do exercises and check my answers ### Work on an exercise in VS Code You need Python 3 and VS Code. After [cloning the repository](#clone-repository): 1. In VS Code, choose **File → Open Folder...**. 2. Browse to **Documents → ReDI Projects → redi-intro-to-programming-2026 → exercises**. Choose a lesson, then open one exercise folder. You should see `exercise.py` and `check.py` in VS Code. 3. Open `exercise.py`, write your code below the instructions, and save it with **Ctrl+S** (Windows) or **Command+S** (macOS). 4. Choose **Terminal → New Terminal** in VS Code. The terminal opens at the bottom, in your exercise folder. On macOS, type this in the VS Code terminal and press Enter: ```sh python3 check.py ``` On Windows, type this in the VS Code terminal and press Enter: ```powershell py check.py ```

For teachers

Show teacher instructions Use this section when adding, editing, previewing, or exporting slide decks. ### Practice solutions The solved exercises in `solutions/` mirror the student exercise folders. For Python lessons, each task folder contains only a completed `exercise.py`; the matching `check.py` stays in `exercises/`. Lessons without Python tasks use one `README.md` for exercises and one for solutions. ### Requirements The following tools are only needed to edit or export the slides: - Node.js 20.12 or newer - npm ### Development Install the dependencies: ```sh npm install ``` Start the deck with solutions: ```sh npm run dev:solutions -- src/slides/01-github-desktop.md ``` Or start the generated deck without solutions: ```sh npm run dev:no-solutions -- 01-github-desktop.md ``` Slidev opens the selected deck in your browser. The no-solutions command creates temporary Markdown and removes it when the preview closes. ### Solutions Always edit decks in `src/slides/`. This is the only source copy. Wrap each complete solution slide with these markers: ```md --- class: knowledge-check-slide knowledge-solution-slide --- # Solution The answer goes here. ``` During preview or export, the build scripts create temporary learner Markdown and remove everything between the solution markers. The temporary files are deleted automatically. ### Adding a deck Add each new deck to `src/slides/`: ```text src/slides/ ├── 01-introduction.md ├── 02-variables.md └── 03-conditionals.md ``` Each file is an independent Slidev deck with its own frontmatter and slides. ### Export student artifacts ```sh npm run build ``` This temporarily generates the learner Markdown and exports every deck as a PDF and static HTML: - `slides_solutions/` contains PDFs and HTML with solutions. - `slides_no_solutions/` contains PDFs and HTML without solutions. Each HTML deck is one self-contained file that works offline. These two root folders are for generated student artifacts only. Do not put source Markdown or development files in them.
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