What the test covers
Every TACHS skill maps to the content the test covers, so practice time goes where the points are.

TACHS
Pioneered by Stanford AI researchers and learning scientists, Aristotle is the world's first voice-based AI tutor. Built for TACHS prep.
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Built for TACHS
Every TACHS skill maps to the content the test covers, so practice time goes where the points are.
Aristotle finds what your child already knows and starts there, instead of drilling material they have mastered.
Aristotle builds the plan backwards from test day and your child's target score.
Test prep
Aristotle tracks 80 TACHS skills, finds the ones costing your child points, and plans review back from test day.
Follows what the test covers.
Your child talks it through. Aristotle coaches from the step that went wrong.
Any time before test day. No booking.
See what's mastered and what's left.
Features
Talk things through, work side by side, and come back next time to a tutor who remembers where you left off.
Ask questions out loud, hear explanations in Aristotle’s voice, and interrupt whenever you need to.
Aristotle draws steps, diagrams, and images to help you learn visually.
Get practice problems tailored to the exact topics you’re struggling with.
From middle-school math to AP exams to SAT/ACT prep. We also build custom plans matched to state standards and specific courses.
Revisit session summaries, session whiteboards, and uploads in one place.
Aristotle can read and navigate any PDFs and images with the learner. That includes textbooks with hundreds of pages!
We break all subjects down into granular skills, then track mistakes and mastery on each one. Parents can see the whole picture at a glance.
Aristotle remembers every session: what you’ve covered, where you got stuck, how you like things explained. It picks up right where you left off.
The curriculum
Aristotle is designed to always know what to teach at exactly the right time.
Sample curriculum
* Click a topic to see the skills inside
Reading
Written Expression
Mathematics
Ability
TACHS tutoring curriculum80 skills across 4 units
Reading
Topics: Vocabulary in Context, Explicit Meaning, Inferences and Evidence, Organization and Purpose.
Written Expression
Topics: Usage, Mechanics, Sentence and Paragraph Revision.
Mathematics
Topics: Number and Operations, Ratios, Percents, and Applications, Algebraic Thinking, Geometry and Measurement, Data and Probability.
Ability
Topics: Figure Matrices, Paper Folding, Figure Classification.
A few things you might wonder before getting started.
Aristotle's TACHS course tracks 80 skills across 4 units, including Reading, Written Expression, and Mathematics. Every skill is linked to the skills it builds on, so the tutor always knows which parts of TACHS your child has mastered and what to teach next.
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This could be you
For homework, supporting your child, or anything you’ve always wanted to know more about, Aristotle makes it easy for anyone to learn out loud.