ISEE Math tutors, lessons & classes

The ISEE (Independent School Entrance Examination) is one of the two major standardized tests used for admission to American independent (private) schools, alongside the SSAT. The ISEE is administered by the Educational Records Bureau (ERB) and is the preferred or required admissions test for many independent schools across the United States, particularly on the East Coast and in the Mid-Atlantic. The exam comes in three levels: Lower Level for students applying to enter grades 5 and 6, Middle Level for grades 7 and 8, and Upper Level for grades 9 through 12 (most commonly used for grade 9 admissions to independent high schools). Each level tests the same five sections in the same order, but the content and difficulty scale to the appropriate age band. The exam can be taken in paper or digital format depending on the testing location and family preference.

The five ISEE sections are Verbal Reasoning, Quantitative Reasoning, Reading Comprehension, Mathematics Achievement, and an unscored Essay. This page focuses on the two math sections (Quantitative Reasoning and Mathematics Achievement) which together account for about 40% of the testing time and roughly equal weight in admissions decisions. The two math sections test different things and reward different prep approaches, which is the first thing most families and many tutors get wrong: drilling them as if they were one combined math section underperforms compared to drilling them as two distinct sections with two distinct strategies.

Quantitative Reasoning is the first math section in the test order, and it is the one most students find harder. The section tests mathematical reasoning rather than computation: word problems, logical deduction, pattern recognition, estimation, comparison of quantities, and the kind of multi-step reasoning that requires the student to understand what the problem is asking before computing anything. The Upper Level section includes a question type called Quantitative Comparison, where the student is shown two quantities and asked whether one is greater, the other is greater, they are equal, or the relationship cannot be determined; this question type does not appear on the SAT or ACT and requires specific practice. The Quantitative Reasoning section is calculator-prohibited at all three ISEE levels, which is also a structural feature most prep books underemphasize. Students used to calculator-permitted school math underperform on this section if they have not specifically drilled mental arithmetic and pen-and-paper computation.

Mathematics Achievement is the second math section and the one most students find more straightforward. The section tests computational fluency and curriculum-aligned math content: arithmetic, fractions, decimals, percentages, ratios and proportions, basic algebra, basic geometry, and (at the Upper Level) more advanced algebra and the early geometry curriculum. The questions are more directly tied to grade-level math curriculum than Quantitative Reasoning is, and most students who have kept up with their school math do reasonably well here with focused prep. Mathematics Achievement is also calculator-prohibited at all three ISEE levels.

The scoring is structured differently from the SAT or ACT and worth understanding clearly because it shapes how admissions committees actually read scores. Each ISEE section produces a scaled score (between 760 and 940), a percentile rank, and most importantly a stanine (a 1-to-9 score derived from the percentile). Independent school admissions committees almost always look at the stanine first, not the scaled score or percentile. The stanine compresses scores into nine bands: stanine 9 is the top 4% of test-takers, stanine 8 the next 7%, stanine 7 the next 12%, and so on down to stanine 1 at the bottom 4%. Competitive independent schools typically want to see stanines of 7 or higher in math sections; the most selective schools want 8 or 9. A student moving from a stanine 6 to a stanine 8 has improved meaningfully more in admissions terms than the raw scaled-score difference might suggest, because the stanine is what the committee compares across applicants.

The section-adaptive question type allowed for one major change with the recent digital ISEE format. The paper format remains static (every test-taker sees the same questions). The digital format introduced a section-adaptive structure where module-two question difficulty adjusts based on module-one performance, similar to how the digital SAT works. The two formats produce equivalent stanines but the prep strategy differs slightly. Families should confirm which format the testing location uses before tailoring prep.

The Quantitative Reasoning prep approach. The most common mistake on this section is treating it as a computation race. Quantitative Reasoning rewards careful reading first and computation second; students who race through the word problems and miscompute the easier arithmetic lose more points than students who read carefully and compute steadily. Tutors drill close reading of word problems, the identification of what the question is actually asking (often different from what the most obvious computation would produce), and the discipline of double-checking arithmetic against estimation. For the Upper Level Quantitative Comparison questions, tutors drill the specific question type with extensive practice, because the format does not appear elsewhere in American standardized testing.

The Mathematics Achievement prep approach. The section is more straightforwardly curriculum-aligned, which means the prep is more straightforwardly curriculum-aligned. Lessons cover the topic areas in the test specification (arithmetic, fractions, decimals, percentages, ratios, proportions, basic algebra, basic geometry, with Upper Level adding more advanced algebra and early high-school geometry). Students whose school math has gaps in any of these areas benefit from focused content review; students whose school math is solid mostly need format-specific practice on the question style. The calculator prohibition is the structural challenge most students have not faced; drilling mental arithmetic and pen-and-paper computation is essential.

A few honest observations from tutors on what trips up ISEE Math candidates. Underestimating Quantitative Reasoning is the most common; families and students assume the math is the easier section because the computation is simpler, and lose points because the reasoning takes specific practice. Treating the two math sections as one is the next pattern; they reward different strategies and need to be prepped separately. Skipping the calculator-free practice; students used to calculator-permitted school math significantly underperform on the no-calculator format. Not understanding the stanine scoring; families focused on raw scaled scores miss that the stanine is what admissions actually reads. And not practicing under timed conditions; the ISEE sections are timed tightly and students who have not sat full timed past papers run out of time.

The ISEE format and timing varies by level. Lower Level: Verbal Reasoning 20 minutes 34 questions, Quantitative Reasoning 35 minutes 38 questions, Reading Comprehension 25 minutes 25 questions, Mathematics Achievement 30 minutes 30 questions, Essay 30 minutes. Middle Level: Verbal Reasoning 20 minutes 40 questions, Quantitative Reasoning 35 minutes 37 questions, Reading Comprehension 35 minutes 36 questions, Mathematics Achievement 40 minutes 47 questions, Essay 30 minutes. Upper Level: Verbal Reasoning 20 minutes 40 questions, Quantitative Reasoning 35 minutes 37 questions, Reading Comprehension 35 minutes 36 questions, Mathematics Achievement 40 minutes 47 questions, Essay 30 minutes. The math sections together account for over an hour of the testing time and significant admissions weight.

How our tutors prep candidates. Most lessons start with a diagnostic against an official ISEE practice test at the student's target level. ERB publishes official practice materials and the What to Expect on the ISEE guide for each level. The diagnostic produces section scores (stanines if a full practice test is sat) and surfaces the weaker section and the dragging content areas. From there, lessons rebalance toward the weak section. Quantitative Reasoning gets dedicated work on the Quantitative Comparison format (Upper Level) and on word-problem strategy. Mathematics Achievement gets content-gap fill where needed plus format-specific practice. Both sections drill calculator-free mental arithmetic and computation. Closer to test date, lessons shift to full timed mock papers under real exam-clock conditions, with section-by-section stanine projection. For SAT and ACT prep at the older end, our SAT Math and ACT pages cover the related work for high school students.

The Strommen ISEE Math roster includes private school admissions specialists, former independent school math teachers, longtime tutors with deep ISEE prep track records, and tutors who have specifically prepped students for the most selective independent schools in Los Angeles, the Bay Area, New York, Boston, and elsewhere. Each tutor's bio specifies their experience, the levels they prep (Lower, Middle, Upper), the stanine target they typically work with, and which student profile fits them best. Match yourself to a tutor whose specialty matches your target schools and your child's current level. Browse the tutor list, find a bio that matches your situation, and book the free trial.