Learn by playing
games you built.

ProBlocks turns fractions, French verbs and photosynthesis into playable worlds. Build them with a sentence, play them with friends, and chat about what you're stuck on.

Free for your class of 10 Ages 10+ No installs
today's lessonGrade 6 · Math
Fractions of a whole

Students can identify ½, ⅓ and ¼ in real-world situations.

prompt"a pizza shop where you slice pies into the fractions customers ask for"
I wantone third!¢
level 3 · 2 of 5
+12 xp
Pizza Fractions
made by Ava · plays 14
Turn any subject into a game
#Fractions
#Photosynthesis
#French verbs
#World history
#Shakespeare
#Cell biology
#Algebra
#Poetry
#Chemistry
#Geography
#Mythology
#Coding
#Fractions
#Photosynthesis
#French verbs
#World history
#Shakespeare
#Cell biology
#Algebra
#Poetry
#Chemistry
#Geography
#Mythology
#Coding
How it works

Learning that plays you back.

Most ed-tech is a worksheet with skin. ProBlocks is the opposite: you build the world, then wander around inside it.

01
Describe a world

You (or your teacher) type a sentence about what you want to learn. ProBlocks turns it into a playable world.

"a castle where you unlock doors by solving equations"
02
Play & get stuck

You play the game. When you hit a tricky bit, Claude shows up as a character in the world — not a popup.

Try cutting the pie in half first — then see how many halves fit.
03
Chat, remix, level up

Message classmates, trade levels, and rebuild anything. Every remix teaches you a bit more about how it works.

Ava
Kai
Juno
+
3 classmates online
Class chat

Talk about the game, inside the game.

A classroom messenger built for making, not doom-scrolling. Share levels, ask for help, and see what your class is working on — all teacher-moderated.

# grade-7-math
28 members · Mrs. Vasquez is watching
● Safe
K
Kai · 3:21
how do you do the floaty jump on level 3?? 😭
A
lower the gravity to like 6 — then double jump unlocks
K
Kai · 3:22
wait you can EDIT the physics?
A
yep — open the Bear and look at Movement. im sending my version
A
Cloud Donut Bear — remix
remix · tap to play
J
Message #grade-7-math…
Built for classmates, not strangers
A messenger that knows your class.

Chat lives inside the studio, not across three apps. Students can share levels as playable cards, co-edit games in real time, and ask Claude as a group — while teachers stay in the loop.

Share playable levels

Drop a game in chat — classmates tap to play without leaving the thread.

Ask Claude together

@claude in any channel. The whole group sees the explanation.

Teacher-moderated

No DMs with strangers. Every channel has a teacher on it.

Kindness filter

Messages are gently rephrased if they come across as mean. Students approve the rewording.

Heads up, from Claude
"That message sounded a bit sharp. Want to try: 'Could you explain how you solved that? I'm stuck.'"
For students

Your brain on pizza.

You don't learn fractions by circling B. You learn them by slicing a pepperoni into thirds while a cat yells at you.

Quests, not homework

Every lesson is a level.

Beat levels, earn badges, unlock new world-builder tools. The harder the math, the cooler the stuff you can build next.

Slice 20 pies into thirds
+60 xp
Design a fraction trap level
+120 xp
Remix a friend's pizza shop
+80 xp
Explain ½ + ¼ to the cat NPC
+140 xp
Level 7 · Baker
640 / 1000 to level 8
Make it yours
Your character, your rules.

Design your avatar, your home base, and your own quest chain. Everything you make follows you across every game.

Play with your class

Your friends are already here. Join their games, co-build worlds, and race through quests together.

Claude is your study buddy

Stuck? Ask in plain words. Claude explains — and plays the level with you to show how.

No one sees your mistakes

Wrong answers just mean the level resets. No red Xs, no grades screaming at you.

Publish to the world

Great games (with teacher approval) can land on the public Marketplace for everyone to play.

For teachers

Assessments you actually enjoy reading.

A student's game is the rubric. Watch what they built, and you see what they understood.

Fractions unit · week 2
Grade 7 · 28 students
● 22 playing
Skill map · who gets what
½ of a whole
⅓ and ⅔
¼ grouping
add ½ + ¼
compare ⅓ vs ⅖
Legend: not tried struggling getting it got it
M
Mira has retried ½ + ¼ six times. Her levels skip the step where pies combine.
86%
on pace
14
games built
4.6h
active time
Maps to your curriculum

Type an objective — "identify ½, ⅓ and ¼" — and we suggest game templates that hit it. Works with CSTA, NGSS, Common Core.

Live skill heatmap

See which students are stuck on which concept in real time. No grading pile, no waiting until Friday.

Class chat, moderated

Every channel has you on it. Flagged messages, kindness nudges, and a gentle filter for outside links.

Lesson authoring in English

Describe the lesson; we generate a starter world, quest list, and rubric. Edit anything before class.

Built by students

Every subject, playable.

A peek at worlds built by real classrooms this week. Each card is a real game you can open, play and remix.

Math
½ · ⅓ · ¼
Pizza Fractions
"slice pies into the fractions customers ask for"
Biology
Photosynthesis
Tiny Plant
"a seedling that grows by catching sunbeams"
History
Roman Republic
Rome on Foot
"a senator delivering scrolls through ancient Rome"
Language
French present tense
Le Marché
"shop at a French market without knowing English"
2H₂ + O₂
Chemistry
Stoichiometry
Mix & Match
"brew potions that balance reactions"
English
Iambic pentameter
Sonnet Swap
"a poet fills in missing words in Shakespeare"
Real classrooms

Kids build weird things.
Weird things teach well.

"

I made a game where you have to slice a pizza into thirds before the cat eats it. Now I actually get fractions. My brother is jealous.

A
Ava, 12
Grade 7
"

I used to grade 28 worksheets a week. Now I play 28 tiny games on Friday and I can see exactly who doesn't get it. It's faster AND kinder.

M
Mrs. Vasquez
Math teacher, Ridgewood MS
"

I hated French. Then we built a market game where I had to buy a croissant without switching to English. I asked for TWO croissants yesterday.

K
Kai, 13
Grade 8
"

They're arguing about photosynthesis at lunch. About PHOTOSYNTHESIS. I didn't know this was an option.

M
Mr. Odu
Biology teacher, Bright Academy
Questions

Parents & teachers ask this first.

No. Students actually build the world they're learning in — the game wraps the concept, it doesn't hide it. Slicing pizzas to make ⅓ IS fractions.