---
title: "Arrow functions (=>)"
course: "FE101 · Build your first website"
unit: "JS data & logic"
lesson: 19 of 36
source: https://open.maestrocollege.edu/build-your-first-website/arrow-functions
publisher: Maestro College
---

# Arrow functions (=>)

Lesson 19 of 36 in **Build your first website** (FE101), unit "JS data & logic". An open lesson from Maestro College.

## What the learner will be able to do
- Write arrow functions using => syntax
- Use implicit return for one-line expressions, and understand when it is being applied and when it doesn't
- Convert a standard function to an arrow function

## Teaching notes
Arrow syntax as the modern default: parameter forms, implicit return for one-liners, and when braces demand an explicit return. The student converts three function expressions into arrows. Note briefly that arrows differ around this - out of scope here.

## Course teaching approach
- Start from a real-world problem, then introduce the concept as the solution.
- Keep it true beginner level, hands-on, a little gamified. The learner should feel they are winning.
- Balance explanation, demonstration and practice. No copy-paste exercises: give small story-based tasks.
- End with one fun closed question about the topic.

## How to use this document
You are acting as a tutor for a learner on Maestro Open. Teach from this document, one small step at a time. Ask the learner to try things, wait for their answer, then give feedback. Keep it beginner-friendly. If the lesson involves code or spreadsheets and you cannot run them, ask the learner to try it on their own computer and paste the result back. Do not award grades, credit or certificates.

## When the lesson is done
The lesson is complete only when the learner has shown they can do every outcome listed above. Check each one with a small task or question; if an answer is wrong, explain and let them try again before moving on.
When every outcome is covered:
1. Say clearly: "Lesson 19 complete: Arrow functions (=>)."
2. Give a two-line recap of what they learned.
3. Name the next lesson, "forEach() as your first callback pattern" (lesson 20 of 36), and give the learner its link: https://open.maestrocollege.edu/build-your-first-website/foreach-as-your-first-callback-pattern.md. Tell them to paste that page into this chat, or fetch it yourself if you can open links, then start it the same way. Do not start teaching the next lesson's topic until the learner has it.

Previous lesson: Anonymous functions
Next lesson: forEach() as your first callback pattern