ABOUT K12 SUMMER WORKBOOKS
What if learning felt like an adventure?
Learning should be fun and exciting. So we make free STEM lessons and little practice apps that start with a question, not a worksheet. If you can read, you can use it.
NEW Start with an intro.
OUR MISSION
Growing a new generation of thinkers and learners.
We start with curiosity. Ask a question, explore it, and keep going as far as you want. If you can read, you can use it.
X is for eXplore
Every lesson starts with a question, not a quiz. Our apps end in X because X stands for eXplore.
Free for everyone
The lessons and apps here are free and public. No sign-up.
No sign-up
The apps run in your browser. Anything they save, like your score, stays on your device.
A friend to school
Supplemental learning aids for home, summer or class. Not a school, and not a curriculum replacement.
WHY WE ARE HERE
Schools and teachers do important work every day. We add something extra.
Here, each learner can follow their own questions, at their own pace.
We use AI tools to help us research, build and check our lessons. Most lessons list the sources they use.
Our goal: help everyone move forward, and beyond.
FROM THE FOUNDER
How it started
It started with summer — and a simple wish: make something fun for my own kids.
Custom worksheets were the first idea. They worked… kind of.
But they felt dry and bland. Checking boxes isn’t the same as lighting up a mind.
Then the shift: asking questions — the right questions. That’s when learning got exciting again.
Ask better questions. That’s how better thinkers — and a brighter future — get started.
THE METHOD
Ask. Explore. Apply.
Three simple steps in every lesson.
STEP 1
Ask
Start with a curiosity question. Not a quiz, just something to wonder about.
STEP 2
Explore
See what, how, why and when with simple pictures and examples.
STEP 3
Apply
Try it, spot it in real life and talk it over with a grown-up.
FREE PRACTICE APPS
Meet the seven free apps
Quick games and explorers that go with our lessons. Free and no sign-up. Anything the apps save, like scores, stays on your device.
BEGINNER MATH · 144 facts
Multiplication X
Type the answer. Pick tables 1 to 12. Play 10 or 20 cards and watch your facts known grow.
Free. Opens in a new tab.
BEGINNER MATH · 66 facts
Addition X
Type the answer. Pick your numbers. Play 10 or 20 cards and watch your facts known grow.
Free. Opens in a new tab.
BEGINNER MATH · 55 to 210 facts
Subtraction X
Type the answer. Choose within 10 or within 20, then try fact families and missing-number cards.
Free. Opens in a new tab.
INTERMEDIATE MATH · 144 facts
Division X
Type the answer. Pick your divisor tables 1 to 12. Play 10 or 20 cards and watch your facts known grow.
Free. Opens in a new tab.
BEGINNER SCIENCE
Periodic Table X
Tap any element. See its atom, what it is used for, and a fun fact. Then try Quiz me.
BEGINNER SPACE · 35 objects
Solar System X
Explore 35 worlds, moons and more. Tap one to see where it is and how big it is.
BEGINNER TYPING · 3 levels, 16 lessons
Typing X
Type the words to fly your rocket. Start at the home row, pick Beginner, Intermediate or Advanced, and reach your goal speed and accuracy to dock at the space station.
Free. Opens in a new tab. Works best with a real keyboard. Progress stays on this device.
Read the lesson →
