Krista King Math.jpg


So math.. it can be kind of challenging at times can't it?

But you know what? It’s not a problem if you’re not head-over-heels in love with solving for x. Really, it just means you’re in good company with at least 85%* of the rest of the population who also have a tough time with math.

*my own estimate—not based on official research. but let's be honest, it's probaby 85% or more. 

But it does become a problem when your annoyance with solving for x gets in the way of following your dreams. Like when failing a math class means you won’t graduate on time. Or when math is so hard that you have to change majors. Or when you know you’ve got no chance at a decent GRE score to get into that grad school program you’ve been lusting after for years. When things like that happen, it’s just not fair. We all deserve to achieve our dreams—math nerds or not. 

It’s why I started working as a math tutor in college. And why, even though I graduated with a degree in psychology, I kept tutoring math via YouTube. I loved helping students uncover those little “Ah-ha!” moments when math theories actually clicked for them enough to pass their tests, so I didn’t stop. And while YouTube videos were a great first step towards helping lots of students at once, I knew I could help students uncover even more of those “Ah-ha!” moments with things like: Formula cheat sheets that make math terms way less confusing. Notes that show you what’s essential to remember, what’s safe to forget, and slash study time significantly. Quizzes to make sure you “get it”. An open Q&A where I can answer questions when things don’t totally click

So I created

step by step courses.jpg



I’ve helped students who would inevitably fail squeeze by with a grade 10% higher than the one they needed to pass. And people who failed high school math get accepted at prestigious universities for degrees in mathematics.

I don’t say stuff like that to brag, just to be totally honest with the fact that math is possible to figure out, and even if you feel like you’re cursed in that area, there is still hope for you.

Even if you’re not a math whiz, math can still be easy for you.

Yes, even if you’re in a Calculus III class and everyone else in your class is failing miserably.

Whatever reason you’re taking math classes for—to become a scientist, doctor, or just complete the math requirements for your liberal arts degree—there’s one fact you can’t run away from: you’ve got to pass this class or change your major.

And if you change your major, you’ll also have to change your life plans.

Which is so not fair.


Math shouldn't be hard.jpg
Your dream isn't a partial derivative



I have students from all walks of life studying inside Calculus Expert:

  • Traditional, four-year college students who just need to pass a class to graduate on time
  • High school students in the running for valedictorian status (and all the scholarships that entails)
  • Students who need to keep their grades up to keep their scholarship money
  • People studying for the GRE so they can get into grad school
  • Professionals who want to change their career path, but need a foundation in math to make that happen

And here’s how Calculus Expert has helped them:

“Not only reinforces what was covered in class, but also speeds up the time it takes to complete homework.”
“I’m an almost 40-year-old mom of 3 that went back to school to be a math teacher… with one night of studying before my final a week and a half ago, you helped me go from being 100% in the dark to [passing my test] with an 87%!! Never in my wildest dreams did I even think I would have done that well on that midterm.”
“I passed my exams and was subsequently accepted to study a BSc Mathematics and Economics degree at the University of London. All this at the age of 34, after failing math in high school.”
“At one point during Calc II I thought about dropping math entirely from my schedule, but since joining Calculus Expert, I’ve added a math minor.”
“My first two term tests were 31% and 33% after the curve. I considered dropping the class…. I checked my marks today and I got a 73% on my exam, and I passed the class!”
“When I had a question you always got back to me in just a few hours. The way you explained the answers to all of my questions was in a way that made Calculus fun and easy… I was able to get a 97.6 in Calculus!”

And you know what?

These students are just like you.

But since they made the decision to get help instead of letting math beat them up, they passed their classes, achieved their dreams, and now have lives they wouldn’t have if they’d let math get in their way.

save over 50% with a one-year subscription.


Guided courses.jpg
The courses





Pre-Algebra is the basis you need for all the math classes you’ll ever want to take. If only it weren’t for those darn fractions making things complicated. (We know your teacher lied when she said fractions were simple, don’t worry.) Learn more


In Algebra 1, there are lots of numbers + letters and math theory that sometimes don’t make much sense. Learn how to simplify all of it and get a true grasp on what’s going on. Learn more


Yeah, shapes are cool. But not when you have to pick from a list of a million theorems to prove why a triangle is a triangle. In this Geometry course, learn which theorems to pick, in what order, and how to apply them to ace your homework every time. Learn more


It’s like Pre-Algebra & Algebra 1 got together and had a really ugly baby. You thought you had all the complicated equations down, only to realize things like equation systems and advanced factoring exist. (Don’t worry, we’ll help you simplify it.) Learn more


You thought you signed up to study triangles, but now your teacher is insisting you memorize a unit circle? Don’t worry, we’ve got some good tricks that make it much, much easier to remember. Learn more


You’re studying all kinds of curves and complex numbers. And then your Precalc teacher throws in imaginary numbers on top if all and it’s just one big mess. You’re pretty good at math at this point, but WHY you need the square root of a negative number is beyond you. Learn more


College-level math just got real. Instead of the math you’re used to that can actually be used to solve real-world problems, you’re dealing with a ton of ambiguous theory that feels impossible to grasp (but we’ve got some super-special secrets to help). Learn more


If Calc 2 is hard, no worries. For most people, it’s harder than Calc 1 and Calc 3. Finding the volume of a 3-D solid object might sound easy at first… but not when you have to use curves and intersecting lines to figure it out. But don’t worry, we’ll help you wrap your mind around it and pass your test with flying colors. Learn more


Most people don't take this class just for the fun of it (or maybe you're the exception!). You probably need it because you want to be some sort of mathematician, scientist, or engineer. The good news is the difficulty of multiple integrals does not have to stop you from achieving your dreams. Learn more


The big, green, angry Hulk-version of calculus. You deal with multiple variables changing at different rates and different rates of change for each one. Yeah, #complicated. (But not too complicated to figure out, so don’t worry.) Learn more

What you get



Here's what you get access to when you sign up as a student of Calculus Expert:

1. Every single math course I've ever made. The fundamentals of middle school math all the way to advanced calculus. Access to every course and lesson you need to ace your class.

2. A structure that makes sense. An optimized course flow to make studying and homework faster. So you “get it” in less time than you would figuring things out on your own.

3. Open Q&A sections. Still don’t understand something? I check into the Q&A sections of the courses at least once every weekday. Ask away. I’m happy to help.

And here's what you get inside of every single lesson:


Watch over my shoulder as I solve problems for every single math issue you’ll encounter in class. We start from the beginning. I explain the setup and why I set it up that way, the steps I take and why I take them, how to work through the fuzzy middle parts, and how to simplify the answer when you get it.


The notes section of each lesson is where you find the most important things to remember. It’s like Cliff Notes for books, but for math. Everything you need to know to pass your class and nothing you don’t.


When you think you’ve got a good grasp on a topic, you can test your knowledge without affecting your grade by taking one of our quizzes. If you pass, wonderful. If not, you can review the videos and notes again, or ask me for help in the Q&A section.

Below each lesson there’s a place for you to ask me questions. Anything goes, as long as it’s math related. There’s even a function for you to upload a picture of your work to show me exactly what you’re getting hung up on.

“Plus, I’ve made all of the videos, notes, and quizzes specifically for non-math minded people.”

Your grade is about to get a serious lift. #winning


Final Edits-0025.jpg
Learn math with Krista


30-Day Money Back Guarantee

If you study our videos and notes and don’t do a double-take when you get your next quiz grade back, ask for a refund.


  • You’ve seen what other students have done after signing up for CalculusExpert:
  • Getting accepted into prestigious university programs.
  • Passing a midterm with a B+ after one night of studying.
  • A high school failure pursuing a math degree.
  • Thinking math was too hard and then pursuing it as a minor.

We know our in-depth videos and course material will help you. We know our courses will be the exact fix you’ve been so desperate for to help you pass your class so you can get on with your education, finish your degree with less stress, and have the career you’re dreaming of.


But if it’s not everything you’ve hoped it would be, we let you try it out risk-free for 30 days. If you’re not happy for any reason, let us know and we’ll process your refund ASAP.

save over 50% with a one-year subscription.


Imagine how good you’ll feel taking your next math test knowing that you’re going to pass it.

P.S. If Calculus Expert doesn't sound right for you right now, I still have plenty for you to check out. Start with my blog or my YouTube Channel.