What Is on the TSI Math Test? Domains, Topics, and Prep Plan

If you are searching for “what is on the TSI math test,” you are almost certainly preparing for the TSIA2 — the Texas Success Initiative Assessment 2.0, which is the current version of the TSI used at Texas public colleges and universities since January 2021. This guide covers exactly what the TSI math section tests, how the current TSIA2 format differs from the original TSI, what the four content domains include, how the adaptive scoring works, and how to build an effective prep plan.

ViewMath is not affiliated with or endorsed by the Texas Higher Education Coordinating Board (THECB) or the testing vendor for the TSIA2. Always verify current policies with your specific Texas institution.

TSI vs. TSIA2: What Changed?

The original TSI Assessment was the Texas college placement test before January 2021. The original TSI math section used four content categories:

Elementary Algebra and Functions
Intermediate Algebra and Functions
Geometry and Measurement
Data Analysis, Statistics, and Probability

The TSIA2, which replaced it in 2021, uses updated domain labels but covers largely the same mathematical content:

Quantitative Reasoning
Algebraic Reasoning
Geometric and Spatial Reasoning
Probabilistic and Statistical Reasoning

The TSIA2 also introduced a Diagnostic section for students who do not score at the college-ready level on the initial test, which provides more information about which skills need strengthening. If you see a prep book labeled “TSI” without a 2 or “2.0,” check the publication date — materials written for the original TSI are less relevant for today’s test.

The Four TSIA2 Math Domains in Detail

1. Quantitative Reasoning

This domain covers the foundational number skills that support all the other domains. You cannot score well in Algebraic Reasoning without fluency in Quantitative Reasoning. Topics:

Number operations: Whole numbers, order of operations, factors and multiples, prime factorization, absolute value
Fractions: Adding, subtracting, multiplying, dividing fractions and mixed numbers; simplifying
Decimals: Operations with decimals; converting between decimals and fractions
Percents: Finding a percent of a number, finding what percent one number is of another, percent increase and decrease
Ratios and proportions: Setting up and solving proportions, unit rates, scale problems
Number sense: Estimation, reasonableness, comparing numbers on a number line

Strategy: This domain is the most accessible. Students who are shaky on fractions and percents should tackle this domain first — it builds confidence and creates the foundation for algebraic work.

2. Algebraic Reasoning

This is the largest and most impactful domain. Strong performance here is the single biggest driver of a high TSIA2 math score. Topics:

Linear equations: One-variable equations, equations with variables on both sides, literal equations
Linear inequalities: Solving and graphing; multi-step inequalities; compound inequalities
Systems of equations: Graphing, substitution, elimination; identifying no-solution and infinite-solution cases
Polynomial operations: Adding, subtracting, and multiplying polynomials; applying exponent rules
Factoring: GCF, difference of squares, factoring trinomials (a = 1 and a ≠ 1)
Quadratic equations: Solving by factoring, completing the square, and the quadratic formula
Rational expressions: Simplifying, multiplying, and dividing rational expressions
Functions: Function notation, evaluating functions, identifying domain and range

Strategy: Spend at least half your total prep time here. Start with linear equations and work forward. The quadratic formula and rational expressions are the topics students most often run out of time to review.

3. Geometric and Spatial Reasoning

This domain is frequently underprepared. Many students focus exclusively on algebra and are surprised by the number of geometry questions. Topics:

Area and perimeter of triangles, rectangles, circles, and other polygons
Surface area and volume of prisms, pyramids, cylinders, cones, and spheres
Coordinate geometry: distance formula, midpoint formula, slope of a line
Angle relationships: complementary, supplementary, vertical angles, angles formed by parallel lines
Pythagorean Theorem and its converse
Similar and congruent figures: scale factor, proportional side lengths

Strategy: Create a formula reference sheet and memorize it before test day. Most geometry questions are straightforward once you know the formula — the challenge is knowing which formula applies. Practice identifying the correct formula from the question, not just computing once you have it.

4. Probabilistic and Statistical Reasoning

This domain tests your ability to work with data and reason about chance. Topics:

Measures of center: mean, median, mode; when each is most appropriate
Measures of spread: range, mean absolute deviation, standard deviation (conceptual only)
Data displays: bar graphs, histograms, box plots, scatter plots, frequency tables; reading and interpreting
Simple probability: calculating probability, complement rule
Compound events: independent and dependent events, multiplication rule
Sampling: distinguishing random from biased samples; interpreting survey results

Strategy: Data interpretation questions are often the fastest to answer on the test — if you practice reading graphs and tables quickly. Dedicate one study session to each major graph type (box plot, scatter plot, histogram) so you can extract information efficiently.

How TSIA2 Scoring Works

The TSIA2 math section is computer-adaptive. The test software adjusts question difficulty based on how you answer each question. There is no set number of questions — the algorithm collects responses until it can produce a reliable score.

Scores are reported on a scale of 310 to 390. Each Texas institution sets its own college-ready cutoff. Many institutions use a score in the range of 350 as the college-ready threshold, but some set it higher and some lower. A score below the cutoff triggers placement into a developmental or co-requisite support course.

If your initial score falls below college-ready, you will likely complete a Diagnostic section. The Diagnostic is not a second full test — it provides the institution with additional information about which skills need the most work and may take 20–30 minutes to complete.

Sample Practice Question: One Per Domain

Quantitative Reasoning: A jacket costs $64. What is the price after a 12.5% discount?
Solution: Discount = 0.125 × 64 = $8. Sale price = $64 − $8 = $56.

Algebraic Reasoning: Factor completely: 3x² − 12x
Solution: GCF = 3x. 3x(x − 4).

Geometric and Spatial Reasoning: Find the area of a circle with radius 7. (Use π ≈ 3.14)
Solution: A = πr² = 3.14 × 49 = 153.86 square units.

Probabilistic and Statistical Reasoning: A data set is 5, 8, 12, 15, 20. What is the mean? What is the range?
Solution: Mean = 60/5 = 12. Range = 20 − 5 = 15.

TSI Math Prep Plan by Timeline

4 Weeks or More

Week 1: Quantitative Reasoning — fractions, percents, ratios, proportions. Daily 30-minute sessions, 15–20 problems.
Week 2: Algebraic Reasoning Part 1 — linear equations, inequalities, systems.
Week 3: Algebraic Reasoning Part 2 — polynomials, factoring, quadratics, functions.
Week 4: Geometry and Statistics — review formulas, data interpretation, mixed practice test.

2 Weeks

Focus on Algebraic Reasoning (1 week) and Quantitative Reasoning (half a week). Use the remaining time for a full practice test and error review. Touch the geometry formulas at minimum.

1 Week

Prioritize the topics where your diagnostic test showed the most missed questions. Take one full timed practice test at the midpoint and one the day before the exam. Rest the night before — fatigue on an adaptive test costs more than one missed topic.

TSI Math Resources

ViewMath publishes practice test books and study guides for the TSIA2 covering all four domains. Each book includes full worked solutions, topic-by-topic review, and diagnostic practice tests. Browse the full TSI/TSIA2 collection using the sidebar.