Don't Pay for a Tutor

Full university courses, not just flashcards

Reef.science is not a flashcard app with engineering stickers on it. Each course is built around a concept graph - a map of every topic and how it connects to the ones before and after it. We break courses into micro-lessons that build on each other, so you can start from the prerequisite you forgot and work your way up to the topic that is giving you trouble. The concept graph knows the dependencies, and it will guide you through them in the right order.

We cover the full university curriculum for each course, not just the greatest hits. That means you will find topics on here that your professor covers but other study tools skip over.

Courses we cover

We are building content across the core engineering curriculum. Here is where things stand right now, with problem counts growing every week.

Practice until it clicks

Here is the beautiful thing about parameterized question generators: they never run out. Every time you click "next," you get a brand new problem with fresh numbers, fresh diagrams, and a fresh solution walkthrough. You can practice the same concept fifty times with fifty different sets of values until the method becomes second nature. That is how real learning works - not by memorizing one example, but by seeing the pattern across dozens of them.

The concept graph

Engineering topics do not exist in isolation. You cannot understand bending moments without understanding forces, and you cannot understand forces without understanding vectors. Our interactive concept graph makes these connections visible. You can zoom in on any course, see how hundreds of concepts link together, and click any node to jump straight into that lesson.

It is genuinely fun to explore, even if you are just curious about how the pieces fit together. Try the concept graph explorer and see for yourself.