About Us

HappyGrader was originally designed in 2013 in Carlsbad, CA by Jeff Simon, a veteran secondary math and science teacher with a background in electrical engineering. Jeff and his colleagues used his prototype written in VBA for Excel for ten years to grade more than ten thousand exams, as it proved to cut their grading time in half while increasing consistency in grading and returning results and feedback to students faster than grading by hand. While HappyGrader has been developed and used by math teachers, it can be used for any subject, with students in any grade to create and re-apply smart scoring guides that include full- and partial-credit to any types of questions. With the financial support of family and friends, Jeff has teamed with local experts to build HappyGrader as a web-based app.

Jeff Simon

Founder & CEO


Jeff has taught math and science in San Diego County for over 30 years. He has always loved working with kids, and used to hate grading until designing HappyGrader! Jeff earned his BS in electrical engineering and a BA in sociology from UCSD, where he focused on machine learning. After securing his teaching credentials, Jeff went on to  earn an MA in educational leadership, and he helped establish a STEM-based high school in Carlsbad, CA where he was Teacher of the Year in 2015.

Devin Loftis

Head of Engineering


Devin has over 30 years of experience in software development, product management, and strategic technology planning across a variety of education-related software platforms. Most recently, Devin was VP of Product Management and Engineering for the K12 Assessments division of Instructure (publisher of Canvas & MasteryConnect). Formerly, Devin was Director of Online Product Engineering for CTB/McGraw-Hill.

Sandra Erdtmann

Creative Director

Starfisch Design

Sandra is a passionate designer, Creative Director and executive leader with over 25 years of industry experience. She launched her career during the tech boom in San Francisco, working with clients like Nike, Bank of America and Motorola. Her traditional design and print education have shaped her approach to all things creative, including; sophisticated identity systems, impactful interactive tools and award-winning campaigns.

A Tool that Will Make Grading Easier!

Score responses in a familiar spreadsheet-like interface with on-screen prompts. Let HappyGrader assist you to identify patterns in your students' responses. Use rubrics to breeze through free-response questions. Who knew grading could be this easy!

What Teachers Are Saying