Join for FREE & Take a Diagnostic Test or Academic Assessment

Practice tests with detailed assessments to help boost your scores for:

    • SAT
    • ACT
    • SHSAT
    • TACHS
    • 8th Grade Math & ELA
    • 7th Grade Math & ELA
    • 6th Grade Math & ELA

“The assessment was so insightful. We learned exactly what my daughter needed to focus on.”

– Sharon Greene MD (parent)

Plus, You'll Also Get Access to

Video math lessons and practice problems for 

  • Pre-Algebra
  • Algebra 1
  • Geometry
  • Algebra 2

Create Your Free Account

You’ll get instant access to our diagnostic tests and academic assessments. You’ll be able to take any of them that you like and get instant feedback, so you’ll know what to work on.

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Joining will give you access to our Pre-Algebra, Algebra 1, Geometry and Algebra lessons & practice problems. Plus, you’ll get access to diagnostic tests for SAT, SHSAT, TACHS and Regents.

Caddell Prep is supported by the biggest names in education

Do you need expert help to prepare for a specific test? Sign Up for an Individual Course: is used by students across the United States and in 23+ other countries!


Prepare for High-Stakes Tests with Courses that were Designed with an Engineer’s Approach from the Ground Up.


Test Prep is Available for SAT, SHSAT, TACHS, Regents and NYS Tests. is Recommended by Experts in Education.


“Improved his score by almost 100 points and got a 610 on the real test!…”

“…The videos were very clear and helpful…”

“…Chris still uses the site for help with Geometry.”


“Following the lessons on Caddell Prep helped my son get ready for the SHSAT and get accepted to Staten Island Tech.”

– L. Gonzalez (parent)

“The lessons were great. My daughter received a scholarship to her first-choice school and was accepted to all three.”

– Jean Kearns (parent)

“I liked how the lessons were presented. They were easy to follow. I also liked that there were practice problems after each lesson, so I could practice what I just learned. I got into Brooklyn Tech thanks to Caddell Prep.”

– Henry Liu (student)

“I’ve already recommended Caddell Prep to other parents.”

– Joann Hotaling (parent)

Many students have busy schedules that don't allow time for a scheduled prep class or tutoring session.

Students have a lot going on. With after-school programs, extracurricular activities such as Boy/Girl Scouts, music practice, sports, work, volunteering, etc., it’s often difficult to commit to a set schedule.

Not to mention the parents’ schedule. Parents have lives too, believe it or not. Sometimes it’s not possible to bring kids to and from classes.

You may find it difficult commuting to a reliable center or tutor.

We are located on Staten Island and have had students travel hours each day to get to our office from Brooklyn, Queens and the Bronx. However, students who aren’t able to travel to our office may not have access to a a reliable resource with proven results like us.

Our Online Test Prep is perfect for parents and students like you

Our prep courses are pre-recorded, including lessons and explanations.

Plus, since they are rehearsed and recorded, you’ll always get the best lesson and explanation.

You’re free to move through the lessons at your own pace.

Prepare on Your Computer, Tablet or Phone

Mobile Optimized

Take your test prep with you on the go. Our website is optimized to function on newer phones and tablets.

Let’s be serious. Students are busy and on the move. Sometimes students are able to study at a desk or table, but many times they need to make the most of their free time wherever they are. Being able to transition from desktop to laptop to tablet to phone makes it much easier to study.