How to Prepare for the ISEE: A Complete Guide for Private School Applicants

Each year thousands of families applying to top private schools ask the same thing: how do we prepare for the ISEE? The Independent School Entrance Examination is required or accepted by many of the most competitive private schools in North America, including Phillips Exeter and Andover. Some Canadian schools use their own assessments instead (for 2027 entry, Upper Canada College, Havergal College and Crescent School do). Even so, many students and parents are unsure where to begin, how long to prepare, or what a competitive score looks like.

This guide covers what families need to approach the ISEE with confidence, from the test structure to a targeted study plan.

What the ISEE is and who takes it

The ISEE is a standardized admissions test that hundreds of independent schools use to evaluate applicants. It is run by E3n, the nonprofit formed from the merger of the Educational Records Bureau (ERB) and the Enrollment Management Association, so you will still see it called the ERB test. It has four levels, set by the grade a student is applying to: Primary (grades 2 to 4), Lower (grades 5 and 6), Middle (grades 7 and 8) and Upper (grades 9 through 12). Primary tests only reading and math. Most students with a competitive private school application sit the Middle or Upper Level.

The test has five sections:

• Verbal Reasoning (synonyms and sentence completion)
• Quantitative Reasoning (mathematical problem-solving and quantitative comparisons)
• Reading Comprehension (passages with multiple-choice questions)
• Mathematics Achievement (curriculum-based math questions)
• Essay (one unscored writing prompt, sent directly to schools)

At the Middle and Upper Levels the four scored sections have 40, 37, 36 and 47 questions, and total testing time is two hours and 40 minutes, plus two 10-minute breaks. Scores are reported on a stanine scale from 1 to 9, and stanines of 7, 8 and 9 are seen as highly competitive for selective schools.

What ISEE score do top private schools expect?

Competitive private schools generally look for stanines of 7 or higher, and the most selective often expect 8 to 9. Schools do not publish cutoffs, so ask each school how it uses ISEE scores. At strong but less intensely selective private schools, a 6 or 7 may be enough when paired with good grades and recommendations.

This general benchmark table shows how stanines map to percentile ranges:

Stanine	Percentile range	Competitiveness
9	96th-99th	Highly competitive for any school
8	89th-95th	Strong for selective boarding and day schools
7	77th-88th	Competitive for many private schools
5-6	40th-76th	Average range; may limit options at highly selective schools
1-4	Below 40th	Below average for independent school applicants

One thing to remember: the ISEE is normed against independent school applicants in the same grade over the past three years, not all students. Stanines 7 to 9 together cover the top 23% of that group. A score at the 70th percentile is therefore more competitive than it sounds, since you are measured against a self-selected group of academically motivated students.

How long should you prepare for the ISEE?

Most students do well with three to four months of structured preparation. For highly selective schools, starting five to six months ahead leaves time to fix vocabulary and math gaps and still complete several full practice tests.

A realistic plan runs like this:

1. Month 1: Take a diagnostic, find the weak areas, and begin steady vocabulary building and math review.
2. Month 2: Build skills section by section, especially Verbal Reasoning, which needs the longest lead time.
3. Month 3: Complete full-length timed practice tests, review the errors and refine your pacing.
4. Month 4: Take final practice tests, do a light review, polish test-taking strategy and rest before test day.

Students with big vocabulary gaps, or who are rusty on pre-algebra and algebra, may need more time. Experienced private school tutors say Verbal Reasoning is the hardest section to improve quickly, because it depends on a broad vocabulary built over years of reading. Starting on it early pays off.

Which ISEE sections are hardest to prepare for?

Verbal Reasoning is widely seen as the toughest to improve in a short time. It tests synonym recognition and logical sentence completion, and both rely on a wide, precise vocabulary. Students who have read heavily since an early age have a real edge. For those who must build vocabulary fast, structured word lists built around roots, prefixes and suffixes are far more efficient than memorizing single words.

Quantitative Reasoning can also catch strong math students out, because it includes quantitative comparison questions, which call for a different kind of thinking than ordinary computation. Being good at classroom math does not automatically mean doing well here. Dedicated practice on this particular question format is essential.

Mathematics Achievement is the most closely tied to the school curriculum, so it responds best to traditional studying. Students who have completed a solid pre-algebra and algebra program (as most in advanced or private school programs have) should find it manageable with targeted review.

How to structure your ISEE study plan

The most effective preparation pairs steady daily practice with deliberate error review. This section-by-section approach suits students at competitive private and advanced program schools:

Verbal Reasoning: Spend 10-15 minutes a day learning new words from high-frequency ISEE lists. Concentrate on roots and learning from context. Practice synonym questions under time pressure at least twice a week.

Reading Comprehension: Read challenging non-fiction regularly, including scientific articles and historical essays. Read actively by summarizing main ideas and noting the author's tone and purpose. Work through timed reading sections to build stamina.

Quantitative Reasoning and Math Achievement: Diagnose the specific gaps first. Common weak spots for Upper Level students are number properties, ratios, geometry and basic algebra. Use targeted drills for each gap before moving on to full-section practice.

Essay: The essay is not scored, but admissions officers do read it. Practice writing clear, organized responses in 30 minutes or less, with a focused thesis, two or three supporting points and a clean conclusion. Admissions readers can tell a polished essay from a rushed one.

A tutor who specializes in private school entrance exams can speed up preparation considerably, especially for Verbal Reasoning and for the Quantitative Reasoning question types students seldom meet in regular school math. You can read about our private school entrance exam tutoring to see how Bosen Academics supports ISEE preparation.

Preparing for the ISEE is a meaningful investment in your child's academic future. With the right structure, targeted practice and attention to what each section demands, most students can reach scores that reflect their real ability and give an application a strong base. If your family wants expert support with private school applications, book a free consultation with Bosen Academics to connect with a tutor experienced in ISEE preparation.