ACT (One-On-One) Tutoring Only

Approximately 20% of my students get accepted into Ivy League Schools

Dr. G.W. Greenwood – ACT Tutoring Service in Johns Creek. Opening at 9:00 AM.

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Education

Ga. Institute of Technology, Atlanta, GA, Engineering Mathmatics

PHD

Harvard University, Cambridge, MA, Graduate School of Business Administration

MBA

Harvard University, Boston, MA, School of Special Education, ADA, 504, IEP

PHD

GA. Institute of Technology,  Atlanta, GA, Industrial and Systems Engineering

BSIE

GA. Institute of Technology, Atlanta, GA

(Retired Professor)

About Me

Dr. G.W. Greenwood: Over the last ten years, I have tutored (One-on-One) over nine hundred and eighty-five: High Performance/Potential "ACT Students", and High Performance/Potential "ACT Students" with IEP/504 Issues.

Since I retired as a Georgia Tech Professor, after twenty-seven years, Harvard Alumnus, I have tutored over 975 students in all subjects areas on both the ACT and SAT college entrance exams. It is my concerted opinion; however, that the ACT is, for the vast majority of students, 98%, the superior exam, for a multiplicity of reasons. The principle advantage is that on the ACT, the subjects are clearly delineated, for example English, Math, Reading, and Science. On English test on the ACT there are a finite number of grammar questions and a finite number of structural and punctuation questions; whereas, on the SAT they tend to glom every subject into an English and Math score Equivalent, confusing the students. The ACT material tested on its exam has changed very little during the last fifteen to twenty years: where the SAT continues to be a “moving target” and have changes in both the materials and format of the SAT exam every 24 +_ months, adding significant confusion on the preparation of their exam.

I have two doctorates, one from The Georgia Institute of Technology in Engineering Mathematics, and one from Harvard University in Special Education (ADA IEP/504).

I tutor, in retirement, because I love teaching, and it is personally very rewarding for me to see “my students” get admitted into the colleges and universities to which they deserve to be admitted. As a Harvard Alumnus, I have stayed very well informed on the part the ACT plays in the admissions and scholarship awarding process of both the Ivy League schools and with the country’s other top performing colleges and universities.

I only tutor “one-on-one”, this process, based on an M.I.T. study in 2001, “is at least 500% more efficient than any form of group or online tutoring”.

I first administer a series of diagnostic tests to each student and then analyze each of their results, with the student. I then develop a “Teaching Plan” that is specifically tailored to your student’s strengths, learning process, and weaknesses. I still cover 100% of the substantive material, but will carve out specific time for any subject deficiency, like trigonometric transformations, for example.

Approximately 20% of my students get accepted into Ivy League Schools; however, I tutor students at all levels, including adults who decide to return to obtain their college degrees. I work with all “IEP and 504” students. I am dyslexic, with two dyslexic daughters, and fully understand the process requirements from the student’s perspective, the parent’s perspective, as well as the teacher’s perspective, and their effect on standardized testing. Please feel free to call or text me at 770-992-2000 so that we can discuss my methodology and the needs and aspirations of your student. Please call early as my schedule fills up quickly.

PLEASE TEXT: 770-992-2000, TEXTING WILL GUARANTEE THAT I RECEIVE YOUR MESSAGE QUICKLY, THANKS.

I have selected weekday and weekend tutoring sessions. 
 
I am also listed on Wyzant.com a Nationwide Tutoring Listing Service where you can see additional information and my profile which indicates “370” ***** (five star) ratings out of “380” total ratings from parents. Click here to see my Wyzant Tutoring Profile.
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Call

770-992-2000
( Voice or Text )

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Address

755 Kimball Parc Court Johns Creek, GA 30022 USA

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Email

gwgreenwoodiii@gmail.com g.w.greenwood@comcast.net

Updates

Keeping you informed with recent updates

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“One-on-One” ACT tutoring only; tutored over five hundred students; retired Ga. Tech Professor; Harvard Alumni; 98% five-star reviews; Ivy League aspirants; IEP/504 specialist; call or text to talk about methodology; limited spaces; reserve position(s) early; please read “full” reviews. Thanks, g.w..

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One-on-one tutoring only; retired Ga.Tech Professor, Harvard Alumni, tutored over five hundred students, Ivy League aspirants and IEP and 504 students. 98.9% five-star ratings, please read full google Ratings, call for tutoring methodology. g.w.

A smiling man in a purple polo shirt indoors.

Retired Ga.Tech Professor, Harvard Alumni, one-on-one tutoring, Ivy League aspirants, IEP/504 specialist, you call and I pick up fantastic, if not please text, texts monitored, voicemail only once per day. scheduling for February ACT, thanks.

Smiling man in a purple polo shirt standing indoors near framed art.

Retired Ga.Tech Professor, Harvard Alumni, one-on-one tutoring only, 98% five-star, IEP/504 certification.

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Retired Ga.Tech Professor, Harvard Alumni, one-on-one tutoring only, Ivy League aspirants and IEP/504 specialist. Reserve December 9th, February 10th, and April 12th. Tutored over four hundred ACT/SAT students.1-770-992-2000

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Retired Ga. Tech Professor, one-on one tutoring only, Ivy League aspirants, IEP/504 accomodations, tutored 400+ students.

Testimonials

What they say about my teaching

Dr. G.W. Greenwood - ACT Tutoring place picture
5.0
Based on 69 reviews
powered by Google
scott unger profile picture
scott unger
17:57 30 Dec 25
Dr G.W. Greenwood is amazing! Very patient and thorough in is methodology. My son, Alexander, loved working with Dr greenwood. I absolutely believe he is the reason for the vast improvement in my sons scores. He went from a 29 in science to a 36!! From a 25 in reading to a 36!! And from a composite score of 29 to a 34. Would recommend Dr Greenwood to anyone trying to be the best they can be.
scott unger profile picture
scott unger
17:57 30 Dec 25
Dr G.W. Greenwood is amazing! Very patient and thorough in is methodology. My son, Alexander, loved working with Dr greenwood. I absolutely believe he is the reason for the vast improvement in my sons scores. He went from a 29 in science to a 36!! From a 25 in reading to a 36!! And from a composite score of 29 to a 34. Would recommend Dr Greenwood to anyone trying to be the best they can be.
Saket Churiwal profile picture
Saket Churiwal
18:49 09 Dec 25
With the help of Dr. Greenwood, I was able to learn ACT strategies quickly and was able to secure a 35 on my first try after just two months of working with him
Saket Churiwal profile picture
Saket Churiwal
18:49 09 Dec 25
With the help of Dr. Greenwood, I was able to learn ACT strategies quickly and was able to secure a 35 on my first try after just two months of working with him
Mahesh P profile picture
Mahesh P
01:28 07 Mar 25
We are incredibly grateful for Dr Greenwood's tutoring for my son Aarnav and his impact on our son's ACT preparation. Dr Greenwood ACT's exceptional knowledge, structured approach, and personalized guidance helped my son achieve an outstanding score of 35 on his first exam. Beyond just teaching content, Dr GW provided invaluable test-taking strategies. DR GW helped my son master techniques to solve complex problems. Dr GW's dedication and encouragement made all the difference. We highly recommend Dr Greenwood to any student looking to excel on the ACT!
Mahesh P profile picture
Mahesh P
01:28 07 Mar 25
We are incredibly grateful for Dr Greenwood's tutoring for my son Aarnav and his impact on our son's ACT preparation. Dr Greenwood ACT's exceptional knowledge, structured approach, and personalized guidance helped my son achieve an outstanding score of 35 on his first exam. Beyond just teaching content, Dr GW provided invaluable test-taking strategies. DR GW helped my son master techniques to solve complex problems. Dr GW's dedication and encouragement made all the difference. We highly recommend Dr Greenwood to any student looking to excel on the ACT!
Pad Narayanan profile picture
Pad Narayanan
16:45 15 Dec 24
Our experience with the Dr. Greenwood for my son was truly transformative. From the very first session, it was clear that this wasn't just test prep — it was a masterclass in strategy, critical thinking, and confidence-building. The Dr.Greenwood approach was meticulous, leaving no stone unturned. Every session was tailored to my son's strengths and weaknesses, with clear, actionable feedback. The depth of content covered was remarkable, from mastering complex math concepts to refining reading comprehension skills. My son’s score improvement exceeded our expectations, but more importantly, he gained self-assurance. I wholeheartedly recommend Dr. Greenwood for any parent seeking excellence.
Pad Narayanan profile picture
Pad Narayanan
16:45 15 Dec 24
Our experience with the Dr. Greenwood for my son was truly transformative. From the very first session, it was clear that this wasn't just test prep — it was a masterclass in strategy, critical thinking, and confidence-building. The Dr.Greenwood approach was meticulous, leaving no stone unturned. Every session was tailored to my son's strengths and weaknesses, with clear, actionable feedback. The depth of content covered was remarkable, from mastering complex math concepts to refining reading comprehension skills. My son’s score improvement exceeded our expectations, but more importantly, he gained self-assurance. I wholeheartedly recommend Dr. Greenwood for any parent seeking excellence.
Satya Giri profile picture
Satya Giri
01:41 26 Sep 24
Dr. Greenwood has been incredibly helpful for our rising senior. The concepts Dr. Greenwood explained helped in improving the scores by at least 4 points in ACT. He would point out mistakes and guide to overcome them. I would definitely recommend Dr. Greenwood for ACT coaching. My friend's son scored 34.25 composite score.
Satya Giri profile picture
Satya Giri
01:41 26 Sep 24
Dr. Greenwood has been incredibly helpful for our rising senior. The concepts Dr. Greenwood explained helped in improving the scores by at least 4 points in ACT. He would point out mistakes and guide to overcome them. I would definitely recommend Dr. Greenwood for ACT coaching. My friend's son scored 34.25 composite score.
Sivaram Chandrasekaran profile picture
Sivaram Chandrasekaran
23:51 16 Sep 24
Dr. Greenwood's coaching approach, combined with valuable strategies for tackling challenging questions and effective time management, significantly helped my daughter improve her ACT score by 5 points in just two months. We also appreciated the flexibility in accommodating schedule changes, and my daughter enjoyed Dr. Greenwood's friendly and engaging teaching style. We highly recommend Dr. Greenwood for in-person ACT prep!
Sivaram Chandrasekaran profile picture
Sivaram Chandrasekaran
23:51 16 Sep 24
Dr. Greenwood's coaching approach, combined with valuable strategies for tackling challenging questions and effective time management, significantly helped my daughter improve her ACT score by 5 points in just two months. We also appreciated the flexibility in accommodating schedule changes, and my daughter enjoyed Dr. Greenwood's friendly and engaging teaching style. We highly recommend Dr. Greenwood for in-person ACT prep!
Sima Pandey profile picture
Sima Pandey
21:31 21 Apr 24
Dr. Greenwood is the BEST!! Dr. Greenwood helped my daughter with her ACT preparation. She was struggling and he was able to get her through several difficult topics. He is patient, kind, and able to meet students where they are in their learning. He is a gifted tutor who helps students overcome their hurdles to meet their goals. He took her on last minute and worked with her for several months in order to get the score she needed to get into a highly competitive program. He taught her study skills that she can use for college as well. I would highly recommend Dr. Greenwood for all students! He has a way in connecting with his students and is a great mentor! 5 stars!! You will not regret using him!! I truly appreciate his flexibility as well! Thank you again Dr. Greenwood!!
Sima Pandey profile picture
Sima Pandey
21:31 21 Apr 24
Dr. Greenwood is the BEST!! Dr. Greenwood helped my daughter with her ACT preparation. She was struggling and he was able to get her through several difficult topics. He is patient, kind, and able to meet students where they are in their learning. He is a gifted tutor who helps students overcome their hurdles to meet their goals. He took her on last minute and worked with her for several months in order to get the score she needed to get into a highly competitive program. He taught her study skills that she can use for college as well. I would highly recommend Dr. Greenwood for all students! He has a way in connecting with his students and is a great mentor! 5 stars!! You will not regret using him!! I truly appreciate his flexibility as well! Thank you again Dr. Greenwood!!
Hamiyat Neeraj profile picture
Hamiyat Neeraj
20:01 28 Dec 23
The best thing that happened to my child this year was getting in touch with Dr.Greenwood.
He is extremely qualified ,knowledgeable and passionate .
Knows how to teach ,unlike these mushroom growth of tutoring centers which have no knowledge whatsoever how to teach.Been through so many and in the end the results were the same .
But with Dr.Greenwood my child skills, comprehension and of course the interest in learning are enhanced.
And the result speaks for itself.
He’s truly a dedicated teacher and such a blessing!
Hamiyat Neeraj profile picture
Hamiyat Neeraj
20:01 28 Dec 23
The best thing that happened to my child this year was getting in touch with Dr.Greenwood.
He is extremely qualified ,knowledgeable and passionate .
Knows how to teach ,unlike these mushroom growth of tutoring centers which have no knowledge whatsoever how to teach.Been through so many and in the end the results were the same .
But with Dr.Greenwood my child skills, comprehension and of course the interest in learning are enhanced.
And the result speaks for itself.
He’s truly a dedicated teacher and such a blessing!
Stephanie Hill profile picture
Stephanie Hill
21:31 18 Nov 23
Dr. Greenwood has been a wonderful tutor for my daughter. He is so patient, kind and encouraging with her, and worked with her in all of the areas where she needed help. I would highly recommend him to anyone looking for an ACT tutor. We are so appreciative of everything he has done for daughter!
Stephanie Hill profile picture
Stephanie Hill
21:31 18 Nov 23
Dr. Greenwood has been a wonderful tutor for my daughter. He is so patient, kind and encouraging with her, and worked with her in all of the areas where she needed help. I would highly recommend him to anyone looking for an ACT tutor. We are so appreciative of everything he has done for daughter!
Harriet Ivy profile picture
Harriet Ivy
14:19 22 Sep 23
Dr. Greenwood puts in the time and hard work one-on-one to help kids reach their full potential.
Harriet Ivy profile picture
Harriet Ivy
14:19 22 Sep 23
Dr. Greenwood puts in the time and hard work one-on-one to help kids reach their full potential.
Christy M profile picture
Christy M
15:44 22 Aug 23
Dr. Greenwood really helped my daughter improve her ACT score. He really focused on her needs and identified what areas she needed to work on. He is very patient, knowledgeable and cares about his students. The one on one tutoring is well worth it. I highly recommend him. Thanks again!
Christy M profile picture
Christy M
15:44 22 Aug 23
Dr. Greenwood really helped my daughter improve her ACT score. He really focused on her needs and identified what areas she needed to work on. He is very patient, knowledgeable and cares about his students. The one on one tutoring is well worth it. I highly recommend him. Thanks again!
aida Alvarez profile picture
aida Alvarez
17:29 08 Aug 23
Dr. Greenwood was wonderful! Immediately knew what my daughter needed to do to get her score up in a particular section. The one on one tutoring experience was exceptional. ACT section score improved significantly. Highly recommend!
aida Alvarez profile picture
aida Alvarez
17:29 08 Aug 23
Dr. Greenwood was wonderful! Immediately knew what my daughter needed to do to get her score up in a particular section. The one on one tutoring experience was exceptional. ACT section score improved significantly. Highly recommend!
Leslie Workman profile picture
Leslie Workman
13:54 03 Aug 23
My children have met with numerous ACT tutors; Dr. GW is the best. Frankly, there is no comparison. While the other tutors focused on tips and tricks, Dr. GW teaches the material if your student needs help in a specific subject area. He is patient with them and keeps parents informed on progress. The student must be willing to put in the effort with the daily review and weekly practice tests, but the investment is well worth it. This hard-core tutoring increased my daughter's ACT score and helped my daughter develop better study habits.
Leslie Workman profile picture
Leslie Workman
13:54 03 Aug 23
My children have met with numerous ACT tutors; Dr. GW is the best. Frankly, there is no comparison. While the other tutors focused on tips and tricks, Dr. GW teaches the material if your student needs help in a specific subject area. He is patient with them and keeps parents informed on progress. The student must be willing to put in the effort with the daily review and weekly practice tests, but the investment is well worth it. This hard-core tutoring increased my daughter's ACT score and helped my daughter develop better study habits.
Deepa Rao profile picture
Deepa Rao
01:31 01 Aug 23
Dr Greenwood, Thank you very much for working with our daughter over this summer on her ACT prep. Your help and guidance was very helpful in improving her ACT scores . We highly recommend Dr. Greenwood to all those who are prepping for College standardized tests.
Deepa Rao profile picture
Deepa Rao
01:31 01 Aug 23
Dr Greenwood, Thank you very much for working with our daughter over this summer on her ACT prep. Your help and guidance was very helpful in improving her ACT scores . We highly recommend Dr. Greenwood to all those who are prepping for College standardized tests.

Contact

Reach out today for inquiries or any questions. Here to assist you every step of the way.

Business Hours:

Monday to Saturday: 9:00 AM – 9:00 PM and Sunday: 12:00 AM – 9:00 PM

Cities Served

Johns Creek, GA
Alpharetta, GA
Milton, GA
Roswell, GA
Duluth, GA
Suwanee, GA
Cumming, GA
Crabapple, GA
Norcross, GA
Peachtree Corners, GA
Sandy Springs, GA
Dunwoody, GA
Atlanta, GA
Lawrenceville, GA
Mountain Park, GA
Dacula, GA
Buford, GA

ZIP Codes Served

30022
30023
30004
30005
30009
30075
30076
30077
30350
30092
30096
30097
30020
30360
30040
30041
30042
30043
30044
30346
30328
30068
30356
30023
30093
30019
30010
30566
30362
30010
30091
30099
30518
30519
30188
30169
30115
30071
30360
30338
30024
30046
30045
30028