About 990prep
The person and the method behind every 990prep guide.

Justin DE SIO
Founder of 990prep
I'm Justin. In engineering school, we learn to work smart. But for the TOEIC®, I was stuck. My goal: 800 points. Reality: 550 in year one. I had all the usual tools: The TOEIC® Bible and vocabulary cards. The problem? I spent hours reading rules without getting better. I was working hard for nothing.
I decided to build my own solution. I created a tool focused on fixing mistakes fast, not just memorizing.
Using only my tool, I reached 965 points. I proved it worked on myself, then on my classmates. Today, I'm making this method available to everyone. No more old books, no more expensive courses. Just a platform built by a student, for students.