SME
about
Science
Math
Engineering
About us
The world is built on ideas. Science explains how the world works. Mathematics describes its patterns. Engineering turns that understanding into things that change it.
Harder than it should be
Learning these subjects can feel harder than it should. A formula appears without an explanation. A concept seems disconnected from everything else. A problem has an answer, but the reasoning behind it stays unclear.
Somewhere tonight, a student is stuck on a homework problem with no one to ask. A college student is rereading notes from a lecture that moved too fast. A parent wants to help, or simply wants to learn something new, and doesn't know where to begin.
What we believe
SME was built around a simple belief: understanding should come before memorization.
We bring together explanations, worked examples, interactive tools, and connected concepts to make difficult subjects clear. Instead of simply showing students the answer, we help them see why it works and how to solve the next problem on their own.
Knowledge is more than a collection of facts. It is the ability to recognize patterns, connect ideas, reason through uncertainty, and apply what you've learned.
Why we are SME
Our name has two meanings. The first is what we teach: Science, Math, and Engineering—the disciplines that help us understand the universe, describe its underlying principles, and build what comes next.
The second is what we hope you become. In any field, an SME is a subject-matter expert: the person others turn to when a problem gets hard. Every lesson here works through problems the way an expert would, showing every step and explaining every reason. One problem at a time, that expertise becomes yours.
Who it’s for
Grade school students
Math and science from Kindergarten to Grade 12, one skill at a time, with a picture for every idea, so no one has to fall behind.
College students
University math, science, and engineering, topic by topic, with every step of the work shown, ready whenever a lecture moves too fast.
Busy parents and lifelong learners
Learn something new or relearn what you need to help at homework time. It is never too late, and a few minutes is enough to start.
Education For Everyone
A great education should never depend on where you live, what you can pay, or how you learn best. We built SME for every learner because we believe quality education should be within reach of everyone, everywhere in the world.
Plans start at $1 a month, with no sign-up fee: a price meant to fit almost any budget, so cost is never the reason someone stops learning.
Accessible in how you learn
A fair price opens the door. What happens inside matters just as much. Every lesson is built so that anyone can follow it, whatever their age, their background, or the way they learn best.
Pictures you can move
Drag a picture and watch the numbers change, so an idea makes sense before the formula ever appears.
Every step shown
Type the numbers from your own problem and see the whole method worked out, one plain step at a time.
Plain words
Every lesson speaks to the reader in front of it: short, simple sentences for young students and the full language of the subject for college students.
Learn your way
Start from a grade, a course, or the exact problem you are stuck on. Lessons keep working without a connection, too.
Private by design
No accounts, no ads, and no tracking. What you study is yours, and it stays on your device.
Help us reach more learners
Adults (18 or older) can become promoters: teachers, tutors, parents, and creators. To ask about a promoter agreement, write to us.
Our goal
SME is where curiosity becomes understanding, and understanding becomes capability.
We add new lessons all the time. Today there are 3,183 lessons, from counting to calculus and beyond, and we are just getting started.