First contact
- 5 min — explain patterns and matches.
- 15 min — students play missions 1–6.
- 5 min — compare two solutions together.
- 5 min — each student writes one takeaway.
Goal: literals, dot, character classes, and basic quantifiers.
RegexArena for teachers
A ready-to-use Regex activity for your classroom.
Use 24 progressive missions, exercises, and the Playground to turn Regular Expressions into hands-on practice. Free, no account required, with immediate feedback for students.
24 missionsEnglish + PortugueseNo accountVisual feedback
Student briefing
Learn by doing.
“Open RegexArena, solve the assigned missions, and explain in one sentence what each part of your Regex does.”
match → feedback → adjust → understandLesson plans
Choose the time you have.
Three ready-made formats. Print this page or save it as a PDF from your browser.
Regex in practice
- 10 min — quick Playground demonstration.
- 30 min — students progress through missions 1–12.
- 10 min — paired exercise using Exercises.
- 10 min — discuss mistakes and false positives.
Goal: build, test, and debug patterns.
Full lab
- 10 min — concepts + demo.
- 35 min — mission path.
- 20 min — progressive exercises.
- 15 min — Playground / capture-group X-Ray.
- 10 min — reflection and class feedback.
Goal: applied Regex, groups, validation, and debugging.
Before class
Open the game and Playground on the teacher computer. Share the class link and choose the target mission for the session.
During class
Ask students to attempt a solution before using hints. Turn false positives and false negatives into discussion prompts rather than simply “wrong answers”.
After class
Use the progress/achievement screen as simple completion evidence and ask each student to submit one Regex they created themselves.
Quick assessment
Suggested rubric
40%The Regex matches valid cases and rejects invalid cases correctly.
30%The student can explain the main symbols used.
20%The student tests edge cases and fixes false positives.
10%The solution is readable and not unnecessarily complex.
Help make RegexArena better for teaching.
If you use it with a class, tell us the student level, where they struggled, which explanations were missing, and what teaching feature you would like next.
Send classroom feedbackFAQ
Using RegexArena in class
Do students need an account?
No. The game works without registration. Progress is stored locally in the student’s browser.
Can teachers see a dashboard for all students?
Not yet. This first classroom version keeps adoption friction low. A class dashboard can become a future feature if educators show real demand for it.
Can I use it in high school, college, or bootcamps?
Yes. The path starts with fundamentals and reaches real formats, groups, and lookarounds. Use only the section that matches your class level.
Can I send suggestions?
Yes. Teacher and student feedback is one of the main inputs for future improvements.