ERB CTP Test

Practicing sample questions is one of the best ways to master any test. It allows your child to get familiar with specific question types, build "test-day stamina," and learn how to approach each section with a clear strategy.

Mastering Reading Comprehension

The Reading Comprehension section, aligned with Common Core Standards, evaluates skills in text analysis, identifying main ideas, and determining an author’s purpose. Let’s start with a Grade 3 level challenge.

Refining Writing Mechanics
Now that we’ve tackled reading, let’s pivot to the "nuts and bolts" of language. This Grade 5 question checks for proper pronoun usage which isa common stumbling block for many students.

Visualizing Success in Mathematics
Moving from words to numbers, let’s test spatial reasoning. This Grade 4 question is aligned with Common Core Mathematics Standards and requires you to analyze a graph to find the solution.

If your child is in 3rd grade try these free math resources.

Thinking Logically: Verbal Reasoning

Let’s switch gears again. Verbal reasoning isn't just about vocabulary; it’s about finding patterns and drawing logical conclusions from provided information. This is a chance for your child to demonstrate their ability to think critically and logically with language.

Testing Logical Assumptions

Building on those verbal skills, let’s look at how logic applies to real-world scenarios. This alternate question tests a student's ability to identify a "logical assumption" based on a change in circumstances.

Now, let’s apply that logic to data. Building on those logical skills, let's now turn our attention to quantitative reasoning.

Quantitative Reasoning is about using numbers and mathematical concepts to solve puzzles. Instead of just performing calculations, students must analyze a set of rules to find a solution.

What Makes Math Communication Questions Special?
Available on the CTP 4, these questions go beyond multiple choice. To earn full points, students must "show their work" and explain their logic using words or diagrams.

We are excited to introduce a study guide to help you prepare for Math Communication Questions. We also have included two quizzes for you to practice in our test prep packs. 

The ERB CTP is a standardized test used by many independent schools. It measures student performance in subjects like reading, math, writing, and reasoning.

Core Tests (Most Grades)

• • Reading Comprehension (Grades 1-11)
  • Mathematics (Grades 1-11)
  • Writing Mechanics (Grades 2-11)
  • Writing Concepts and Skills (Grades 3-11)
  • Verbal Reasoning (Grades 3-11)
  • Vocabulary (Grades 4-11)
  • Quantitative Reasoning (Grades 3-11)
  • Science (Grades 3-9, online only)

Special Tests (Select Grades)

• • Word Analysis (Grades 1-2)
  • Auditory Comprehension (Grades 1-3)
  • Algebra 1 (Grades 7-9)

Unlike a typical classroom test where a "good grade" is simply the percentage of correct answers, CTP scoring is more nuanced; your child receives two types of scores:

Raw Score: Simply the number of questions answered correctly. Higher numbers = better performance.

Scale Scores: These are the primary data points used to track performance. They are calculated based on both the number of correct answers and the difficulty level of those specific questions.

To understand how your child is performing, it is helpful to look past the "raw score" (the total number of questions answered correctly) and focus on how the CTP calculates mastery. Content mastery is a metric measures how much a student has actually learned in a subject area. It assumes that if the student took a different version of the test with similar difficulty, they would perform in a comparable way.

To understand where your child stands, the ERB uses several comparative metrics:

• Percentile Ranks: This indicates how many students in a "norm group" scored the same as or lower than your child. A 70th percentile means your child performed better than 70% of that specific group.
• Stanines: This simplifies performance into a 1–9 scale.
  • Stanines 1–3: Below-average.
  • Stanines 4–6: Average (representing over half of all students).
  • Stanines 7–9: Above-average.

These calculations allow the ERB to generate the Individual Narrative and Subscore Reports.

What Makes a "Good" Score?

A "good" score is relative to the Norm Group your child is being compared against. These reports move beyond raw numbers to show Relative Performance which is how your child compares to specific "norm groups," such as other independent or suburban schools.

Your child's percentile or stanine will likely be lower when compared to a "stronger" group (like Independent Schools) and higher when compared to a "weaker" group.

Common Norm Groups include:

• Independent Norm (IN): Students at other independent schools.
• Suburban Norm (SN): Students at suburban public schools.
• National Norm (NN): A representative sample of all U.S. students at that grade level.

Schools use score reports to track progress, identify strengths and weaknesses, and guide instruction. Parents can also use them to better understand their child’s performance.

Through the school's reporting (often via ERB 360 Access), parents typically receive one of three reports:

• Individual Narrative Report: Compares your child's relative performance across subtests to various norm groups using graphs.
• Individual Subscore Report: Provides a deeper dive into "Content Strands" (specific skills within a subject) and displays mastery scores.
• Primary Grade Parent Report (for younger students): Uses simpler classifications: Exceeding Expectations, Meeting Expectations, and Developing.

Pay attention to Probable Range. This is an estimate of how your student might perform if the test used a different selection of questions, helping to identify if a score is a true reflection of their skills.

The Bottom Line for Parents:
Look for overlaps in the "Probable Range." If the ranges for two different subjects (like Math and Reading) overlap, your child’s performance in those areas is likely similar. If they do not overlap, it indicates a genuine difference in relative strength between those subjects. They call it Content Mastery. This measures how much a student has learned in a specific area. It estimates how the student would perform on a different version of the test with equally difficult questions.

Preparing for the ERB’s Comprehensive Testing Program (CTP 5) is less about "cramming" and more about familiarizing your child with how to apply what they already know. Since the test tracks verbal and quantitative reasoning alongside achievement, the strategy should shift as your child matures.

To give your child a competitive edge, move beyond simple review and use a structured Grade-Specific Prep Pack. 

Practice tests help students feel comfortable with the format, reduce test anxiety, and improve performance by reinforcing key skills.

• Hundreds of Practice Questions: Extensive coverage across all tests and quizzes. Practice items covering many of the content strands and domains to ensure comprehensive familiarization with the test material.
• Full-Length Domain-Based Tests: These simulate the deep-dive reasoning skills required for the actual CTP.
• Targeted Quizzes: Shorter, focused sessions to help students maintain engagement and sharpen specific skills in math, reading, and reasoning.
• Detailed Explanations: Clear breakdowns for every answer to help students understand the logic behind difficult questions and improve their scale scores.

The subtests your student takes vary depending on their current grade. To ensure the practice is relevant, select the pack that matches your child's upcoming testing level:

Each level of the CTP introduces new challenges. Here is how to focus your preparation for each specific grade:

Using grade-specific prep packs ensures your child isn't overwhelmed by material they haven't learned yet, while still being challenged by the specific format of the CTP 5.

Reduces "Test Shock": Seeing the layout ahead of time lowers anxiety.

Pinpoints Gaps: Helps you see if they struggle with the content or just the question type.

Builds Resilience: Repeated exposure helps students stay focused during the actual testing window.