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Where are the Crypts of Lieberkühn primarily located? A. Stomach B. Esophagus C. Small Intestine D. Liver E. Large Intestine F. Pancreas The Crypts of Lieberkühn are important glandular structures found within the lining of the small intestine and play a role in secretion and epithelial cell...

I studied almost exclusively with OATbooster while also consulting YouTube and a few more free sites if I needed more clarification on specific concepts. Majority of my learning came from doing practice tests. While studying I was also working a full time job (9am-6pm M-F) so I spent less time...

Dr. Jim Romano’s Summer DAT and OAT Classes are now open. • In-person in Staten Island, NY or live online via Zoom • 25 sessions • Small class environment with personal attention • Dr. Romano teaches 100% of every in-person session • Trusted by students since 2006 Free Q&A every Tuesday at 8...

Combinations and permutations are a fundamental part of DAT Quantitative Reasoning, and understanding when to use each can make a significant difference on test day. The key distinction is straightforward: • Use permutations when order matters • Use combinations when order does not matter...

Most DAT students underestimate what it takes to improve their score — and it costs easy points on test day. In this video, Dr. Jim Romano breaks down how to actually prepare for the DAT and what students should focus on to improve their performance. Students often ask which DAT study...

Dr. Romano put together a free Organic Chemistry cheat sheet covering the most tested reactions on the DAT & OAT. ✅ Grignard Reactions ✅ Diels-Alder ✅ Markovnikov / Anti-Markovnikov ✅ Aromatic Reactions Free download here: Free Orgo Cheat Sheet for DAT | DAT Destroyer by Orgoman Students...

Understanding the difference between E2 and SN2 reactions is one of the most commonly tested and most confusing topics on the DAT. In this video, Dr. Jim Romano explains how to quickly determine whether a reaction will proceed through an E2 or SN2 mechanism, and the key factors that control...

Core Foundation in Dr. Romano’s DAT Courses Students often ask which DAT study materials are used in Dr. Romano’s DAT preparation classes. Two books sit at the core of Dr. Romano’s course curriculum, both online and in person: the DAT Destroyer and the Math Destroyer. DAT Destroyer Math...

One of the most common mistakes on DAT investment problems is confusing total value with total profit. Total investment = 50,000 Total accumulated value = 54,300 Actual profit = 4,300 The equation must reflect profit: 0.14x + 0.02(50,000 − x) = 4,300 Once the setup is correct, the...

Colligative properties are a classic high-yield topic on the DAT General Chemistry section. Understanding how particle number affects boiling point elevation, freezing point depression, and osmotic pressure is essential for solving many exam questions efficiently. In this video, Dr. Jim Romano...

Here is a representative Quantitative Reasoning problem involving prime factorization — a concept that appears frequently on the DAT in disguised form. Problem 224 = (2^a)(7^b) What is a / b ? A) 7 B) 5 C) 7/5 D) 5/5 E) 1/7 Try solving it before looking at the explanation. Solution...

Discount word problems are a common source of lost points on the DAT Quantitative Reasoning section. In this video, Prof. Denis Blois walks through a representative discount problem step-by-step, showing how to correctly interpret percentages, compare original and sale prices, and avoid the...

Sharing a short General Chemistry video for DAT and OAT students. In this lesson, Dr. Jim Romano explains how density problems are tested on the DAT and walks through the setup step by step. These questions are very common, especially for students early in their preparation, and mistakes...

Thank you to the students who have trusted DAT Destroyer over the years. We will continue posting FREE high-yield DAT Biology, General Chemistry, and Organic Chemistry videos to help students prepare the right way. Official Channel: DAT Destroyer by Dr. Jim Romano For free daily help, join...

As a thank-you to the SDN community, SDN members can use the discount code SDNTake10 for 10% off any single Destroyer book (DAT or OAT). Please note: • The discount applies to individual books only • Bundles are already discounted automatically at checkout, so no additional code is needed for...

General chemistry pH calculations are a high-yield topic on the DAT and OAT, and many students lose points by overthinking the setup. In this short video, Dr. Jim Romano walks through a clear, exam-focused approach to pH calculations so you can recognize the correct method quickly and avoid...

Mr. Rostov invested a sum of money into an index fund that pays 9% interest per year. After 30 years, his gain was $1,326,767.85. Prior to the investment, Mr. Rostov was saving $50 per day from his salary. How long did he have to save to invest the needed amount to obtain those gains? A) 2.5...

Question: How many distinct C-13 NMR signals does C₆₀ (buckminsterfullerene) produce? Answer: Even though C₆₀ contains 60 carbon atoms, it produces only 1 C-13 NMR signal. This is because the molecule is extraordinarily symmetrical — every carbon atom occupies an identical environment. In NMR...

At what vertebrae level does the spinal cord end? a) T1–T2 b) Sacrum c) L1–L2 d) T12–L1 e) Coccyx Correct Answer: C (L1–L2) In adults, the spinal cord ends in the lumbar region at the level of the first and second lumbar vertebrae (L1–L2). This cone-shaped ending is called the conus...

SN1 vs SN2 is one of the most tested reaction mechanisms on both the DAT and OAT, and many students still struggle to decide which pathway a substitution reaction will follow. Dr. Romano breaks down the key concepts step-by-step in this short teaching video. What this video covers: • The...

Black Friday Giveaway Winner Announcement | DAT Destroyer | OAT Destroyer Congratulations to our Black Friday Giveaway Winner, @seohyunmiin. You have won a brand-new DAT Destroyer book from Dr. Jim Romano and Orgoman. Please contact us within 7 days so we can confirm your shipping...

Sheldon has 60 fewer apps on his phone than Patricia.Patricia has 5× as many apps as Sheldon.If their total number of apps were divided evenly among three friends, how many apps would each friend receive? A) 12 B) 15 C) 30 D) 20 E) 10 Answer: C Let S = Sheldon and P = Patricia S = P – 60...

If you're feeling stuck with self-study or overwhelmed by the amount of material, our live Zoom-based DAT & OAT classes might be the structure you need this fall. The course is taught by Dr. Jim Romano, creator of the DAT & OAT Destroyer books, and Professor Barengolts, a former NYU Chemistry...

Hi all! I just took the OAT two days ago, and I wanted to share my experience and thoughts like others that I have learned from. Background: I began studying for the OAT with Booster Prep in January for my exam in March full-time. Initially, I followed the 8 week study schedule for content...

I took the OAT on January 4 to apply for the 2023-2024 cycle. I really dedicated my time and energy to studying consistently in order to score well so that I can hopefully get in to a school despite me applying a bit late in the application cycle. I sent my applications to schools in mid...

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Hello, I received my score on 8/18. I scored a 400 in every category: (400/400/400/400/400/400). I have been helping many people decide how to study in a short time frame (<6 weeks) and I would love to help anyone here. However, I am a tutor for both types of chemistry, and thus my studying...

Hello! I took my OAT last week and was pleasantly surprised with my scores. I wanted to share how I studied, my scores, and what resources I used. My scores the first score is what my average practice score was and the second is my actual OAT score. Quantitative Reasoning: 270 -> 350 Reading...

Hey guys I am a current OPT1 who just finished their first round of midterms. I wanted to make a post on here now that school has slowed down a bit. I used SDN a lot when I was preparing for the OAT/applying to schools. I used Chad’s videos a lot at first, which were helpful for understanding...

I had made a previous post about an upcoming OAT and here's how I did: QR 390 RC 350 Bio 340 GenChem 340 OChem 340 Physics 350 TS 350 AA 350 I'm pretty happy with the scores - i've never had more anxiety from an exam and i'm relieved it's over. I'm applying this upcoming cycle and would...

My OAT is in 1 week. I’ve spent probably 4 months studying on top of working full time. Ive taken several practice exams and took the ADA practice exam today. I was hoping to score a LOT better and I’m very discouraged especially with my physics score. Bio/GenChem/Ochem/Physics/RC/QR KAPLAN 1...

I've taken some Kaplan practice exams which i've learned from this page are much harder than the real OAT. I purchased the Princeton Review - Cracking the OAT which comes with two practice exams. Has anyone taken these exams that could tell me how closely they resemble the real OAT? I don't...

Hey everyone! This next semester I’ll be going into my senior year of undergrad. I just wanted to see what y’all thought of my current situation, as I am beginning to stress about the application process! I currently have a 3.3 GPA and if everything goes accordingly I should be able to get that...

Hey guys I am applying to this current cycle unfortunately I applied a bit late like around December 1st, because I wasn't sure to send with my old OAT scored from August which were 260 AA/250. I retook it on December 11th and got no difference basically with 270AA/260. My gpa after the...

Hello! I applied to UC Berkeley's Optometry Program and I have a few questions: -I completed my application prior to the November 30 deadline. Thus, my interview notification date is January 4. Does this mean that is when the committee will make a decision to give me an interview or will...

Hello! I would like some advice from the good people of this forum concerning my OAT results, which I got back yesterday. My cGPA is 3.2 and my sGPA is a bit below that (ditto with my pre-reqs - my post-bacc years-long repair process mostly focused on upper divisions). My biggest strength is...

Hi everyone! so I took the OAT last week after studying for almost 3 months and let's just say my scores did not come out how I envisioned. Ts 290 AA 290 QR:270/RC:300/BIO:300/GC:300/OC:290/PHY:270 I was really hoping for a higher OAT score to weigh out my lower GPA; cGPA: 2.95 sGPA: 3.10. My...

Hi! I utilized SDN / Reddit A LOT when studying for my OAT and locating potential resources, so I thought I would do the same! Plus, I kinda want to get out of Biochem studying for now. Alright, so I took the OAT back in August. A little bit about me: 3.86 GPA / 3.75 Science Optometric...

Hello! I wanted to ask this because I heard that the DAT and the OAT are both made by the same company...and the DAT Bootcamp system, which I have heard good things about, works for the OAT. I sent in my primary application earlier this week (it will probably be complete by the end of October...

Hello, I just took the OAT and did poorly. I do have plans to retake it, but I was wondering should I apply first and then retake it or retake it and then apply? Thank you. My GPA is 3.2 I worked 3-4 years as an optometrist tech. OAT scores QR: 300 Reading: 380 Biology: 330 Chemistry: 250 OC...