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Award-Winning ERB Test Prep Tutors

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+2.5 Average Stanine Point Improvement

1,500+ students accepted to their #1 school choice

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Customized tutoring backed by our 100% Tutor Satisfaction Guarantee.

Why choose LA Tutors 123?

Connect with one of our veteran ERB test prep experts who can help your student learn the techniques and find the confidence to master the ERB. Study smarter, not harder.


We’ll create an adaptable learning plan customized specifically for you. Simple. And somewhat magical.

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Because every student learns differently, we select your ERB expert based on teaching style, location, personality, and availability.

ERB Experts


Enjoy peace of mind knowing we stand behind our service. We guarantee you will be 100% satisfied with your experience and the results achieved.

Success Stories
Admissions Consulting


Our educational consultant will help you select your best fit schools, prepare your ideal application, and demystify the interview process.

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Top ERB Experts Delivering Top Scores

How do you know you’ll get a great ERB tutor or instructor? Well, we only choose to work with the absolute best, which starts with an intensive vetting process (interviews, background checks, simulated tutoring sessions). Then we hand pick the right tutor based on location, specific needs, and personality.

Katherine F.


George Washington University
17 Years of Tutoring Experience

Evan C.


Grand Canyon University
20 Years of Tutoring Experience

Gray W.


University Of Virginia
13 Years of Tutoring Experience

Our Students Excel at These Fine Schools

The Archer School For Girls Brentwood School The Buckley School Campbell Hall Episcopal Crossroads School for Arts and Sciences Geffen Academy UCLA Harvard-Westlake School Marlborough School Marymount High School Milken Community Schools New Roads School Oakwood School Polytechnic School Windward School


1. What is the ERB?

The Educational Records Bureau (ERB) is actually the name of a company that administers comprehensive assessments. What most families refer to as the ERB’s are actually the CTP5 test (created in 2018 as the successor to the CTP4), a test used to assess students in their academic environment and compare student progress. The original intent of this test is to help schools assess growth, see which classes to place your child in, compare grade levels within the school, and even gauge the differences between students across counties and states. The CTP5 test varies in difficulty and content for each grade, and testing specifics like section timing will vary. That being said, the test is not meant to incorporate a timing component, and is designed to be finished with plenty of time so as to accurately assess a student’s content mastery only.

2. When do students take the ERB CTP5?

Schools will determine the exact testing season for the CTP5. You should reach out to your current school to confirm their testing dates for each year.

3. How is the ERB CTP5 scored?

Most private school admissions look most closely at the Independent Norm(IN) stanine(scores compared across independent schools), a score based on a student’s percentile rank when compared to students in the same grade:

Stanine 1 2 3 4 5 6 7 8 9
Percentile 1-3 4-10 11-22 23-39 40-59 60-76 77-88 89-95 96-99

4. Why should my child prepare for the ERB CTP5?

Many schools have updated their admissions policies to become test-optional. This means that what was once a critical component of the admissions portfolio, standardized tests, can no longer be depended upon to demonstrate an applicant’s academic readiness. Instead, most schools will now require some type of standardized test score such as the ERB, which can help paint a clearer picture of your child’s academic potential.

5. Where do I find ERB CTP5 practice tests?

Because the ERB CTP5 is meant to be an natural assessment, ERB does not release any official practice tests or material. As an alternative, you can take the appropriate level of the ISEE, keeping in mind that the level of difficulty is harder on the ISEE and students will have more time to complete the ERB CTP5.

Personalized Game Plan

Below is an example of four individualized curricula we offer for ERB test preparation.


2-5 Weeks Prep Time

Ideal for students who want an ERB crash course in test-prep strategy, would like to focus on one section of the ERB, are looking to make short-term gains, or have limited time.


5-10 Weeks Prep Time

Ideal for students close to their target score who want basic help on the ERB essentials, or extensive tutoring on one to two sections.


2-4 Months Prep Time

Ideal for students who want a comprehensive review of the entire ERB test, including test-taking strategies, and are looking for a significant score increase.


3-5 Months Prep Time

Ideal for students who want extensive help with the entire ERB test, including test-taking strategies, all academic content, and are looking to maximize their score increase.

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