Your whole co-op writes letters for A year.
Every kid in your group gets matched with a kid somewhere else in the country — every match reviewed by a real person, and never someone they already see on Tuesday — plus a monthly pack with everything they need to write back. Families who want the homeschool curriculum can add it. Co-op families save 25%, and your own child's membership is free for the year.
See how a window works
MailDay™ for Co-ops
One kid with a pen pal is lovely. Fifteen kids is a thing your co-op does all year.
01
Your families enroll inside the same couple of weeks and every tier gets the same monthly theme — so the whole group is on the same adventure, even with a wide age spread.
Not a group buy. Not a fundraiser. Not one more thing for the leader to administer.
Why this works better with a group.
Everyone's writing at once
02
Letter-writing stations, envelope decorating, reading letters out loud. Kids arrive with something to talk about that isn't the thing they watched.
It gives meetings something to do
03
The hardest month is the one where a kid loses steam. In a co-op, someone else's kid just got a letter and yours hears about it on Tuesday.
The parents keep each other going
01
The strongest reason a child writes carefully is that someone they like is going to read it. No worksheet has ever managed that.
Some of your families will add the homeschool curriculum. Plenty won't — and they're still getting real academic work out of it every month, without a lesson plan.
A pen pal is already schoolwork. It just doesn't feel like it.
Writing for a real audience
For the families who ask what it counts as
02
Their friend lives somewhere specific. Kids look it up, find it on a map, ask about it. Every envelope has a postmark on it.
Geography and place
03
Practiced on something a child actually wants to finish, every month, without being asked twice.
Handwriting and composition
04
Telling someone what happened, in order, so it makes sense to a person who wasn't there — which is the whole skill.
Narration, informally
05
Including the particular work of decoding another kid's handwriting, which is harder than a reader and considerably more interesting.
Reading, the hard kind
06
Asking a question and listening to the answer. Following up. Remembering what someone told you last time.
The social part
A real person — not their mom, not their sibling — who isn't obligated to care and writes anyway.
And the part a kid actually takes away: someone out there knows me.
Families mix and match. Some take the curriculum, some just the pen pal — everyone's in the same matching pool either way. Co-op rates are annual and unlock at five enrolled families; the leader's own child is free for the year.
The pen pal and the monthly pack
MailDay Core or Minis
One kid their age, corresponding by real mail all year, plus the full nine-page monthly kit — Poppy's letter, mission sheet, stationery, prompt cards, and a fold-up envelope. Minis for ages 3–6, Core for 6–12.
/year
$180 — saves $45 per child
$135
Get Started →
Two ways in. Same matching pool.
Everything above, plus six pillar pages
MailDay Homeschool
/year
$250 — saves $65 per child
$185
Get Started →
A living book anchor — discussion, copywork, narration
A place study — biome plus your own local home base
A character habit — scripts and real-situation practice
A real-life skill, age-tiered — letters, knots, bread, seeds
A nature journal prompt plus page templates
A parent guide for the family week
You're not collecting money, chasing forms, or holding anyone's information.
You do one step. We do the rest.
One window, start to finish
You pick a two-week window.
Email us and we'll set the dates together. It can open any day — if you say yes on a Tuesday, it can start that Tuesday. Ten minutes of your time, once.
1
We send your code and a one-pager.
You get a code in your co-op's name and a one-page PDF you can forward as-is. Your own child's membership is free for the year; we set that up directly.
2
Families enroll themselves, whenever.
Day 1, day 9, whenever they get to it. Each family signs up at joinmailday.com/start and enters the code at checkout — that's what applies the group rate and tags their child to your co-op. Nothing routes through you.
3
Every kid gets matched — usually inside a week.
Our matching system proposes each pairing and a real person reviews it before anyone is notified — always to a kid outside your co-op. Up to 21 days at the outside, and billing pauses if it runs longer. Packs go out to everyone on the 1st of the following month.
4
01
Your window opens whenever you want. Any day of the month. Say yes on a Tuesday and it can start that Tuesday.
Pick a day and see it laid out. Nothing here is a calendar rule — the window is only how long your group's rate stays live.
Two whenevers, one limit.
The window, exactly
02
Each family signs up whenever they get to it. Day 1, day 9 — their child is matched off their own signup, so nobody waits on the group.
03
The only thing that expires is the discount. After two weeks the code turns off; families can still join any time at the regular rate.
The leader's guide — and your own child's year, on us.
Organizing a group is real work, so one child membership is free for the year — full Core or Minis, matched like everyone else. The guide comes with it: how to run a letter-writing station with fifteen kids of mixed ages, written once, works every month.
Free for every leader
- What to have on the table
- The kid who finishes in four minutes
- Mixed ages at one table
- Envelope decorating with a crowd
- The kid who freezes
- What to say when a letter hasn't come
