TestPrep
Student Results

Real Score Improvements. Our Students’ Results.

See individual students' starting and later SAT, AP, ACT and GMAT scores (anonymized), with their study periods and program formats. Outcomes vary by student.

500+
Students Supported
Score Improvements

Before and After Results

Real score improvements from students in our SAT, AP, ACT and GMAT programs.

SAT
Türkiye
Before
1180
After
1420
+240
Elif A.4 months
SAT
Türkiye
Before
1250
After
1410
+160
Emre K.2 months
ACT
Türkiye
Before
24
After
34
+10
Selin L.3 months
AP Calculus
Türkiye
Before
3
After
5
+2
Murat T.6 months
GMAT — old GMAT (200-800 scale)
Türkiye
Before
580
After
720
+140
Can Y.4 months
SAT
Türkiye
Before
1180
After
1420
+240
Ayse C.3 months
ACT
Türkiye
Before
27
After
33
+6
Berkay C.2 months
AP Physics
Türkiye
Before
2
After
5
+3
Defne P.8 months
Featured Successes

Detailed Case Studies

In-depth stories from our students who achieved outstanding results.

SAT
Before
1180
After
1420
+240
points
4 monthsPrivate Tutoring

I was devastated after my first SAT attempt. The diagnostic test identified my weak points in Reading and Math, and my tutor created a focused plan. In 4 months I went up 240 points and got accepted to UCLA!

Elif Arslan
Istanbul, Türkiye
Accepted to UCLA
GMAT
Before
580
After
720
+140
points
5 monthsPrivate Tutoring

After trying other programs, TestPrep Istanbul finally worked. The personalized approach to Data Sufficiency and Critical Reasoning made all the difference. Now I'm doing my MBA at Wharton.

Can Yilmaz
Ankara, Türkiye
Accepted to Wharton MBA
ACT
Before
24
After
34
+10
points
3 monthsSmall Group

The Science section was my biggest weakness. My tutor taught me efficient data interpretation strategies. The small group format kept my motivation high and I went from 24 to 34!

Selin Kaya
Izmir, Türkiye
Full Scholarship to Rice University
What Our Students Say

Reviews From Around the World

Reviews from SAT, AP, ACT and GMAT students and their parents.

SAT
Türkiye

"TestPrep Istanbul helped me increase my SAT score by 240 points! The tutors are incredibly knowledgeable and the personalized approach made all the difference."

Ayse Celik
Student
3 months | Private Tutoring | 1180 -> 1420
SAT
Türkiye

"As a parent, I appreciate the regular progress reports and flexibility. My son went from struggling to confident in just 4 months."

Mehmet Yildirim
Parent
4 months | Small Group
ACT
Türkiye

"The practice tests were incredibly realistic. On exam day I felt completely prepared and scored 34!"

Selin Kaya
Student
3 months | Private Tutoring | 24 -> 34
GMAT
Türkiye

"After trying other programs, TestPrep Istanbul finally worked. Their GMAT strategies are next level. I got into Wharton!"

Can Yilmaz
MBA Candidate
5 months | Private Tutoring | 580 → 720 (old GMAT, 200-800 scale)
AP
Türkiye

"I took 4 AP courses with TestPrep Istanbul and scored 5 on all of them. The tutors know exactly what the College Board is looking for."

Defne Polat
Student
8 months | Physics, Calc, Chem, Bio
SAT
Türkiye

"Worth every penny. Our investment in our daughter's education paid off with a full scholarship. Thank you TestPrep Istanbul!"

Ali Demir
Parent
6 months | Private Tutoring
IB
Türkiye

"I was struggling with IB Math HL. My tutor explained concepts step by step and I scored 7 on my IA!"

Beren Ozkan
Student
4 months | Private Tutoring | Math AA HL
IELTS
Türkiye

"I went from 5.5 to 7.5 in Writing. The Speaking strategies really worked."

Kerem Aydin
Student
3 months | Private Tutoring | Overall 8.0

Student reviews

2,000 approved reviewsApproved student reviews across all our courses

  • IGCSE / GCSE

    Over time, IGCSE English Literature became one of the most organized parts of my IGCSE / GCSE preparation. We could make the workload lighter during busy weeks at school or university. I learned not to spend the same amount of time on every line of a long text. After a while, the questions started to feel much more familiar. My mock results gradually became more consistent. A big thank you to my tutor for all the support :)

    Maxime Lacroix

  • IGCSE / GCSE

    I was taking IGCSE Chemistry at school, but getting used to the exam questions took time. Over time, IGCSE Chemistry became one of the most organized parts of my IGCSE / GCSE preparation. I stopped doing a huge amount one week and nothing the next. I became much more careful with graphs, experiments and data-based questions. I left the exam feeling that I had done what I could. I'm glad I worked with my tutor through this process.

    Reagan Keegan

  • IGCSE / GCSE

    I learned to separate the information needed for a decision from the extra detail. I was really happy with the lessons.

    Mason Warren

  • IGCSE / GCSE

    When I started preparing for IGCSE / GCSE, I wasn't sure what order to study things in. Over time, IGCSE Computer Science became one of the most organized parts of my IGCSE / GCSE preparation. I never felt awkward asking the same thing again. Predicting the output helped me catch small logic errors. My mock results gradually became more consistent. I'm genuinely thankful to my tutor for being patient.

    Tereza Prochazka

  • IGCSE / GCSE

    I finally understood what was going wrong in IGCSE Economics. I wasn't trying to learn new topics at the very last minute.

    Ara Sung

  • IGCSE / GCSE

    The IGCSE / GCSE format felt unnecessarily confusing at first. Lesson times could fit around school, university or work. The lessons where I found the bug myself were the ones I remembered best. Near the exam, it was clear what to keep doing and what to stop. Having the lesson move at my pace made the process feel much easier. Thanks to TestPrep for helping me stay on track.

    Marek Svoboda

  • IGCSE / GCSE

    I stopped listing facts in essays and started building an actual argument. Thanks to everyone who supported me.

    Zoe Fraser

  • IGCSE / GCSE

    Breaking IGCSE Chemistry into smaller pieces worked much better for me. I started tracking the type of mistake, not just the number of questions I completed. Knowing the topic wasn't always enough; I had to learn which information the question actually needed. I started noticing the reason for a mistake much faster. My mock results gradually became more consistent. The preparation felt calmer than I expected.

    Gaia Bernardi

  • IGCSE / GCSE

    We noticed that the resources kept changing during independent study. Communication with the team was straightforward and our questions were answered. Past-paper work continued without falling behind in current school topics. The lessons started being followed without constant reminders from us. Flexible scheduling helped during a demanding school year. We were happy with both the teaching and the communication.

    Ashleigh Vickers

  • IGCSE / GCSE

    The IGCSE / GCSE format felt unnecessarily confusing at first. Working across different difficulty levels made new questions feel less surprising. I stopped listing facts in essays and started building an actual argument. I never felt awkward asking the same thing again. After enough examples of the same question type, the repeated mistakes decreased. Thank you to my tutor and the TestPrep team.

    Phoebe Dwyer

  • IGCSE / GCSE

    As the exam got closer, I wasn't sure what I should actually review. When I got something wrong, we looked at why I chose that answer instead of only checking the solution. I started seeing shorter solutions that were easier to check under time pressure. I'm glad I worked with my tutor through this process.

    Simone Basile

  • IGCSE / GCSE

    I finally understood what was going wrong in IGCSE Statistics. I started seeing shorter solutions that were easier to check under time pressure. I wasn't trying to learn new topics at the very last minute.

    Hailey Foster

  • IGCSE / GCSE

    After my first attempt, I wanted the second round of preparation to feel more organized. I finally understood what was going wrong in IGCSE Turkish. Going back to the lesson recordings helped when I forgot a small step. I can now decide much faster when to move on from a question. I found a better balance between regular school and exam preparation. Thank you to the tutor who stayed supportive until the end.

    Lei Cheng

  • IGCSE / GCSE

    Communication with the team was straightforward and our questions were answered. Online lessons made it possible to continue without losing time on travel. We quickly felt that the tutor was a good match.

    Tessa Mullen

  • IGCSE / GCSE

    I was taking IGCSE Combined Science at school, but getting used to the exam questions took time. Over time, IGCSE Combined Science became one of the most organized parts of my IGCSE / GCSE preparation. The plan changed with my mock and homework results, so the work never felt random. Past-paper questions showed me how different topics could appear together. My confidence improved along with the results. A big thank you to my tutor for all the support :)

    Marta Barros

  • IGCSE / GCSE

    I finally understood what was going wrong in IGCSE Combined Science. When I got something wrong, we looked at why I chose that answer instead of only checking the solution. Past-paper questions showed me how different topics could appear together. Knowing what to study reduced a lot of the stress. My preparation became much more regular and easier to track. It was an intense period, but it was worth it.

    Erdem Korkmaz

  • IGCSE / GCSE

    We weren't sure whether online lessons would be effective. The overall experience was positive from beginning to end.

    Akari Mori

  • IGCSE / GCSE

    As the exam got closer, I wasn't sure what I should actually review. My tutor made it easy to ask questions from the first lesson. My tutor could see my reasoning and usually found the source of an error quickly. Predicting the output helped me catch small logic errors. I became much more comfortable asking questions in class. I was really happy with the lessons.

    Oscar Callaghan

  • IGCSE / GCSE

    I wasn't starting from zero, but the same mistakes kept showing up in my mocks. My tutor usually asked me to explain my thinking before stepping in. I stopped listing facts in essays and started building an actual argument. Thank you to my tutor and the TestPrep team.

    Reina Fujita

  • IGCSE / GCSE

    Breaking IGCSE Turkish into smaller pieces worked much better for me. My mock results gradually became more consistent.

    Shanshan Lu

  • IGCSE / GCSE

    When I started preparing for IGCSE / GCSE, I wasn't sure what order to study things in. I finally understood what was going wrong in IGCSE History. By the end of each lesson, I knew what I was supposed to do during the week. Using the mark scheme to review my own answer was surprisingly helpful. My preparation became much more regular and easier to track. Thanks to everyone who supported me.

    Maya Setiawan

  • IGCSE / GCSE

    Having the lesson move at my pace made the process feel much easier. Over time, IGCSE Physics became one of the most organized parts of my IGCSE / GCSE preparation. After a while, the questions started to feel much more familiar. Thanks to TestPrep for helping me stay on track.

    Riley Raines

  • IGCSE / GCSE

    After my first attempt, I wanted the second round of preparation to feel more organized. Near the exam, it was clear what to keep doing and what to stop. We didn't spend extra time on things I already knew. Separating strategy mistakes from content gaps made progress much quicker. My preparation became much more regular and easier to track. A big thank you to my tutor for all the support :)

    Karan Desai

  • IGCSE / GCSE

    What annoyed me most was losing easy points because I rushed. The feedback I received on IGCSE Sociology was clear and practical. My tutor made it easy to ask questions from the first lesson. Using the mark scheme to review my own answer was surprisingly helpful. There was no overnight miracle, but the progress was easy to see. A big thank you to my tutor for all the support :)

    Karan Patil

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