Dr. Sarah Mitchell

Dr. Sarah Mitchell

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GRE Regular LSAT SPANISH LANGUAGE
GRE 335 / 340
IELTS 8.5 / 9.0
GMAT 720 / 800
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About the Instructor

"Dr. Sarah Mitchell is a distinguished test preparation instructor with over 12 years of dedicated experience helping students achieve exceptional scores on standardized tests. With a Ph.D. in Educational Psychology from Columbia University and advanced certifications in test preparation pedagogy, Dr. Mitchell brings both academic rigor and practical expertise to every classroom.\r\n\r\nHer teaching philosophy centers on personalized learning pathways that address each student's unique strengths and weaknesses. She believes that test preparation is not just about memorizing strategies, but about building fundamental skills in critical thinking, analytical reasoning, and effective communication. This holistic approach has helped thousands of students not only excel on their exams but also develop capabilities that serve them throughout their academic and professional careers.\r\n\r\nDr. Mitchell's areas of particular strength include quantitative reasoning, verbal analysis, and essay writing. Her students consistently report significant score improvements, with an average increase of 15-20 percentile points across all test sections. She has trained students who have gone on to attend prestigious institutions including Harvard, Stanford, MIT, Oxford, and Cambridge."

Academic & Professional Background

Ph.D. in Educational Psychology

Columbia University

2012

Dissertation on Cognitive Strategies in Standardized Testing

M.A. in English Literature

M.A. in English Literature

2008

Focus on Academic Writing & Critical Analysis

Certified Test Prep Specialist

Certified Test Prep Specialist

2013

Certified Test Prep Specialist

IELTS Examiner Certification

IELTS Examiner Certification

2014

Authorized Speaking & Writing Examiner

Published Author

Published Author

2019–2024

Co-authored 4 bestselling GRE & GMAT guides

Exams & Subjects Taught

GRE

Sub-skills Covered:

  • Verbal Reasoning
  • Quantitative Reasoning
  • Analytical Writing

Teaching Modes:

Online Offline Hybrid

GMAT

Sub-skills Covered:

  • Quantitative
  • Verbal
  • Integrated Reasoning
  • AWA

Teaching Modes:

Online Hybrid

SAT

Sub-skills Covered:

  • Math
  • Evidence-Based Reading
  • Writing & Language

Teaching Modes:

Online Offline Hybrid

IELTS

Sub-skills Covered:

  • Reading
  • Writing
  • Listening
  • Speaking

Teaching Modes:

Online Offline Hybrid

TOEFL

Sub-skills Covered:

  • Reading
  • Writing
  • Listening
  • Speaking

Teaching Modes:

Online Offline Hybrid

IELTS

Sub-skills Covered:

  • Reading
  • Writing
  • Listening
  • Speaking

Teaching Modes:

Online Offline

TOEFL

Sub-skills Covered:

  • Reading
  • Writing
  • Listening
  • Speaking

Teaching Modes:

Online Offline Hybrid

LSAT

Sub-skills Covered:

  • Logical Reasoning
  • Analytical Reasoning
  • Reading Comprehension

Teaching Modes:

Online Hybrid

Courses Currently Offered

GRE New Course

General

Duration:

Schedule: |

Starts: February 02, 2026

0 seats

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GMAT Weekend Intensive

General

Duration: 6 Month

Schedule: Fri-Sat | 12:00 AM - 02:00 PM

Starts: January 15, 2026

20 seats

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Teaching Approach & Methodology

Diagnostic Assessment

Comprehensive initial evaluation to identify strengths, weaknesses, and target score gaps

Concept Building

Concept Building

Personalized Feedback

Individual attention with customized improvement plans and one-on-one doubt clearing sessions

Student Results & Impact

2,500+

Students Taught

18 pts

Average Score Improvement

96%

Target Score Achievement

Score Improvement Highlights

GRE
Alex K.
GRE Student
Before

305

→
After

330

IELTS
Priya M.
IELTS Student
Before

6.5

→
After

8.0

GMAT
James L.
GMAT Student
Before

580

→
After

710

SAT
Emma R.
SAT Student
Before

1200

→
After

1480

What Students Say

"Dr. Mitchell's teaching transformed my approach to the GRE."

Michael C. GRE 335

"Best IELTS instructor. Achieved Band 8.5 in 6 weeks."

Fatima A. IELTS 8.5

"Personalized feedback made all the difference."

David W. GMAT 720

Availability & Class Format

Availability

Thursday Available
Weekends Available
Evening Slots Available

Teaching Modes

Online Classes

In-Center Classes

Class Size Preference

8-12

Group Classes

4-6

Small Group

1-1

One-on-One

Academic Integrity Statement

Princeton Prep instructors follow strict academic integrity standards. We guide, teach, and mentor — we never engage in unethical practices. Our commitment is to help students develop genuine skills and knowledge that lead to authentic success.

Learn from an Expert Instructor

Join Dr. Sarah Mitchell's classes and achieve your target scores with personalized guidance

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