Online SAT tutor · accepting new students

Turn your child’s next SAT score into their best.

Online one to one Digital SAT tutoring built around your child’s timeline, current score, and target score , with a 1520 scorer in their corner.

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Dennis Dertli, SAT tutor
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1520Digital SAT
780Math
740R&W
99thPercentile
VERIFIED SCORE1520780 MATH · 740 R&W
Dennis Dertli
Meet DennisVideo introduction
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Dennis Dertli, Digital SAT tutor
Dennis Dertli1520 Digital SAT · Your child’s tutor

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OFFICIAL SCORE VERIFICATION
152099th percentile

Verified by the official College Board score report.

780 Math740 Reading & WritingTested December 6, 2025
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Official SAT score report showing Dennis Dertli's 1520 total score, including 780 Math and 740 Reading and WritingCLICK TO VIEW FULL PDF ↗
01Live 1:1 lessons
02Wordlists & tests
03Desmos shortcuts
04Weekly score plan
Your child’s tutor

Hi, I’m Dennis. I’ve sat where your child is sitting.

Portrait of Dennis Dertli, Digital SAT tutor
Dennis Dertli · 1520 DSAT

I scored a 1520 , 780 Math and 740 Reading & Writing , on the Digital SAT, and I teach the exam I mastered. Your child gets the same methods, materials, and test day decisions that produced that score.

I am a Schoolhouse certified tutor, certified in March 2026 on Schoolhouse, the free peer tutoring platform, and I use the proven methods I developed there. I bring an extensive materials portfolio to every class, including curated wordlists, example tests, targeted practice sets, and subject specific learning materials. I specialize in the Digital SAT, specifically Math, Reading & Writing, and Desmos calculator strategies.

✓
Verified SAT report1520 · December 2025 official scoreView report ↗
SH
Schoolhouse certifiedCertified tutor · March 2026
99
99th percentile1520 Digital SAT
1:1
One to one onlineLive lessons, personal plan
The method

A score plan that knows exactly where it’s going.

No generic lectures. We diagnose the gaps, build the plan, and train the exact decisions the test rewards.

01

Diagnose

We start with your child’s timeline, current score, target score, and the question types costing them the most points.

TRIAL LESSON
02

Build

Your child gets a personalized weekly schedule supported by wordlists, example tests, targeted drills, and subject learning materials from my extensive portfolio.

THEIR ROADMAP
03

Perform

We sharpen pacing, shortcuts, Desmos fluency, and test day decisions through deliberate practice.

TEST READY
What we can master

Targeted support for every point on the table.

A

SAT Math

As a 780 SAT Math scorer, I teach the exact problem solving strategies, pacing shortcuts, and time management skills needed to excel in the Math section.

ALGEBRA · GEOMETRY · ADVANCED MATH
B

Reading & Writing

Your child builds a repeatable approach to grammar, transitions, evidence, vocabulary in context, and the short passage format of the Digital SAT.

GRAMMAR · EVIDENCE · PACING
C

Desmos strategy

Your child learns when the built in calculator is the fastest path , and the exact graphing, regression, table, and equation techniques that save time.

SHORTCUTS · GRAPHING · CHECKING
VERIFIED STUDENT PROGRESS · 21 DAYS

+300 superscore points in twenty one days.

One student, four official College Board practice tests between August 10 and August 31, 2026, and targeted lessons on their weakest question types in between. Every number below is taken straight from their own score reports , open them yourself.

Superscore+300

990 1290

Aug 10, 2026 → Aug 31, 2026
Best Math 690 (Aug 26) + best R&W 600 (Aug 31)
Best single test+230

990 1220

Aug 10, 2026 → Aug 26, 2026
Highest total score in one sitting
Math+130

560 690

Aug 10, 2026 → Aug 26, 2026
Best Math section score
Reading & Writing+170

430 600

Aug 10, 2026 → Aug 31, 2026
Best Reading & Writing section score

Every test, in order

  1. August 10, 2026990430 R&W · 560 MathStarting point
  2. August 23, 20261060470 R&W · 590 Math+70
  3. August 26, 20261220530 R&W · 690 MathBest total · best Math
  4. August 31, 20261170600 R&W · 570 MathBest R&W
4 official College Board practice score reports

Scores taken from the student’s official College Board practice score reports; the student’s name has been redacted from the published PDFs for privacy. Superscore combines the best Math and best Reading & Writing section scores across sittings. Practice results are not college reportable and individual results vary.

VERIFIED STUDENT PROGRESS · 30 DAYS

+150 superscore points in thirty days.

A second student, starting from a stronger 1150, with five official College Board practice tests between September 2 and October 2, 2026. Every number below is taken straight from their own score reports , open them yourself.

Superscore+150

1150 1300

Sep 2, 2026 → Oct 2, 2026
Best Math 630 (Sep 28) + best R&W 670 (Oct 2)
Best single test+120

1150 1270

Sep 2, 2026 → Oct 1, 2026
Highest total score in one sitting
Math+70

560 630

Sep 2, 2026 → Sep 28, 2026
Best Math section score
Reading & Writing+80

590 670

Sep 2, 2026 → Oct 2, 2026
Best Reading & Writing section score

Every test, in order

  1. September 2, 20261150590 R&W · 560 MathStarting point
  2. September 19, 20261210630 R&W · 580 Math+60
  3. September 28, 20261260630 R&W · 630 MathBest Math
  4. October 1, 20261270650 R&W · 620 MathBest total
  5. October 2, 20261260670 R&W · 590 MathBest R&W
5 official College Board practice score reports

Scores taken from the student’s official College Board practice score reports; the student’s name has been redacted from the published PDFs for privacy. Superscore combines the best Math and best Reading & Writing section scores across sittings. Practice results are not college reportable and individual results vary.

Student feedback

What my students say

EmmanuelJuly 19, 2026 · Verified student
★★★★★
“Good teaching, perfect, thank you!”
Dennis Dertli
Reply from DennisJuly 26, 2026

I love our lessons!

REAL STUDENT PROGRESS · TRIAL LESSON

Improvement right after our first trial lesson with my student

A parent shared the student’s first SAT practice test result immediately after our first session , an encouraging first step with more room to grow.

Message from a student's parent sharing the result of their child's first SAT practice test after the trial lesson
Shared after lesson onePersonalized strategy starts making an impact from the beginning.
Want a steady weekly rhythm?See subscriptions
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Lesson bundles

Choose your route to test day.

Single lessons are $60 an hour. In a bundle the rate falls the further ahead you book , $55 an hour at 4 lessons, down to $40 at 20. Not sure yet? Start with the free 20 minute trial , no card, no commitment.

Pay as you go

Single lessons

One 60 minute lesson at a time, booked whenever you need it , no bundle, no commitment.

$60/ 60 min lesson
START SMALL

4 lesson sprint

Focused help for one priority section or skill cluster.

$220$55 / 60 min lesson
  • 4 private lessons
  • Targeted assignments
  • Progress checkpoints
BUILD MOMENTUM

8 lesson plan

A balanced start for sustained Math and R&W improvement.

$400$50 / 60 min lesson
  • 8 private lessons
  • Full skills roadmap
  • Desmos strategy session
MOST POPULAR
SCORE BUILDER

12 lesson plan

Deep preparation for ambitious goals and bigger score gaps.

$600$50 / 60 min lesson
  • 12 private lessons
  • Complete DSAT coverage
  • Test week strategy
1500+ PUSH

16 lesson plan

Full section mastery with time to rebuild weak fundamentals.

$720$45 / 60 min lesson
  • 16 private lessons
  • Section by section drilling
  • Mock test reviews
FULL PROGRAM

20 lesson program

End to end preparation from diagnosis through test day.

$800$40 / 60 min lesson · lowest rate
  • 20 private lessons
  • Complete Math + R&W program
  • Full mock test analysis
  • Priority scheduling
  • Save $20 an hour vs pay as you go

Single lessons are $60 per hour. Bundles are $55 per hour at 4 lessons, $50 at 8 and 12, $45 at 16, and $40 at 20. The 20 minute trial is free with no card required; payment for lessons and bundles is completed securely through Stripe. No email step before checkout.

Weekly subscriptions

A weekly plan that keeps momentum.

Choose 1 to 4 private classes each week. You are billed every four weeks. Choose preferred weekly times and confirm each first lesson through Cal.com.

Click for scheduling
1 CLASS / WEEK

Steady start

4 private classes · $53 per class

$212per 4 week billing period
2 CLASSES / WEEK

Build momentum

8 private classes · $49 per class

$392per 4 week billing period
3 CLASSES / WEEK

Score builder

12 private classes · $48 per class

$576per 4 week billing period
4 CLASSES / WEEK

Full intensity

16 private classes · $43 per class

$688per 4 week billing period

Subscription pricing is at least $8 below the matching lesson bundle total, with better per class rates for larger weekly programs. Stripe renews every four weeks. Choose your preferred weekly times below, then confirm each first lesson through Cal.com.

Your weekly schedule

Choose your regular lesson times

Select a weekday and time for each weekly class. At the end, enter your email and we’ll send your proposed schedule with a Cal.com link for each first lesson.

Choose 1 weekly time
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Before you book

Good questions.
Clear answers.

Still unsure? Email me your child’s current score and test date and I will tell you honestly what is realistic.

Email Dennis ↗
What happens in the trial lesson?+

It is completely free and takes 20 minutes. I meet your child, review their timeline, current score, and target score, identify their biggest opportunities, and map a personalized study schedule. You are welcome to sit in.

Do you teach both SAT Math and Reading & Writing?+

Yes. My score was 780 Math and 740 Reading & Writing, and lessons can focus on either section or combine both in one plan.

Can you help my child use Desmos faster?+

Absolutely. Desmos strategy is one of my specialties. We practice when to use it, the fastest setup, and how to verify answers efficiently.

Can you guarantee a score increase?+

No tutor can guarantee a specific result. I provide a personalized plan, proven methods, extensive materials, and focused coaching; your child’s result also depends on their practice, consistency, and test day performance.

1520
Your next move

Let’s build the score
your child is capable of.

Tell me where your child is now. Tell me where they want to go. We’ll build the route together.

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