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Algebra 2
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Basic Math
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Biology
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Linear Algebra
Prof. Raffi Hovasapian

Thanks Raffi, I appreciate it! You have really helped me see the beauty in mathematics, ever since the multivariable calculus videos.  Your words of wisdom are inspiring! My passion is engineering, RF engineering to be more specific. I love putting the science behind the art! At the moment I am a bit of a math junkie, I love buying used math books on amazon, if you have any recommendations please let me know. Thanks again and best to you as well! Cary

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AP Chemistry
Prof. Raffi Hovasapian

master ,I am studying college level and you are the best chemistry master I ever saw in my life time up to this point, your logical way of explaining is really nice sir, thank you for sharing your lectures with educator.com , I only specially sign up for educator.com because by seeing some of your sample lectures. thank you very much sir, I simply enjoy your biochemistry course

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AP Physics 1 & 2
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Thanks SO SO much for the new video series! I was getting really worried that I wouldn't be ready for the Physics B exam and this is exactly what I needed and it was uploaded just when I needed it! Excellant organization and explanations!

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AP Biology
Dr. Carleen Eaton, M.D.

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AP Chemistry
Prof. Raffi Hovasapian

you are the best.You made chemistry much easier for me.Thank you so much

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Biochemistry
Prof. Raffi Hovasapian

Dear Dr Rafi,

Thank you Dr Rafi and yes there is no doubt that you are the best because of your videos I am doing very well In my Biochemistry class.

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Organic Chemistry
Dr. Laurie Starkey, Ph.D.

educator.com has the best professors.

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AP Chemistry
Prof. Raffi Hovasapian

I know you have heard this before, but I have to say it again....
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College Calculus: Level II
Dr. William Murray, Ph.D.

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Pre Calculus
Prof. Vincent Selhorst-Jones

Never mind I hastened you corrected already. you are the greatest math teacher I have seen so far.

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AP Chemistry
Prof. Raffi Hovasapian

Hi Professor Hovasapian,

I'm Alina from China. Just want to go back here to say Thank You. I've got a 5 on my AP chemistry, and your lectures are basically all my preparation materials. Thank you so much for your dedicated  lectures! They are great lectures for students (including me) who desperately want to learn under a situation that no one around them is familiar with the subject.



Wish you all the best,
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Differential Equations
Dr. William Murray, Ph.D.

Dear Professor William Murry,
Thank you so much for providing an amazing mathematics courses. I was very weak in differential equation and in probability and I have solved all my problems through your courses. I will always remember you in my prayers! Dear Professor, I have one question to you. If you provide a real analysis course through educator.com, it would be very nice of you. As I know you are connoisseur in the field of mathematics, at least you would guide me in real analysis course. As for me, I am doing my M.Phil in economic policy. I am keen to learn the game theory, so for game theory is concerned, it is all about real analysis and optimization. I am good in optimization, but very poor in real analysis. I am looking forward to hear from you soon.
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Turkey

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Chemistry
Dr. Harold Goldwhite, Ph.D.

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Biochemistry
Prof. Raffi Hovasapian

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AP Chemistry
Prof. Raffi Hovasapian

Mr. Hovasapian, you really make me excited to learn chemistry. Your clear understanding of the topics comes through in your clear teaching as well. Thanks so much for your videos!

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Algebra 1
Eric Smith

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AP Chemistry
Prof. Raffi Hovasapian

Hello Professor,

Thank you so much for your awesome lectures. I am sure that you are one of the best chemistry teachers in the nation :)

I have a question about example 5. I understand why the reaction has to be the first order, but why can't C and D be the answers? They are all first order reactions too. The only difference is that they are multiplied by 2 and 1/2.

Thank you so much!

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AP Chemistry
Prof. Raffi Hovasapian

you are the best.You made chemistry much easier for me.Thank you so much

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AP Biology
Dr. Carleen Eaton, M.D.

These lectures are amazing, they make everything so clear and easy to understand!
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AP Chemistry
Prof. Raffi Hovasapian

Thank you professor, I like the way you do your lectures. You explain everything and try to keep everything simple for me to understand. Some other professors ,I have to say, try to make everything complex...I will say u are the best professor here in educator.com. Thanks.

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Linear Algebra
Prof. Raffi Hovasapian

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Best Regards Joel

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Organic Chemistry
Dr. Laurie Starkey, Ph.D.

You are great teacher and this is the first time that I enjoy every ORG Chem lesson!! Now I can remember CTI because it's always come with sound ding ding ding!!!!! lol Thank you so much!! Is it possible to add some lessons about biological molecules like proteins, amino acids, carbohydrates and lipids?

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Geometry
Mary Pyo, M.A.

you are the best, you and educator really saved me from a big nightmare

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Pre Algebra
Nancy Fung, M.Ed.

Dear Ms. Fung,

I love your teaching style! I am using Educator.com to refresh myself after 20 years out of high school. I am getting ready to take my SAT, and want the best score possible. Your courses are really helping me!

Thanks,
James

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AP Biology
Dr. Carleen Eaton, M.D.

Dr. Eaton I am so blessed to study with your lectures !!!
For real, you are the best science/biology teacher overall my high school experience!!!
Thank you so much.

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AP Chemistry
Prof. Raffi Hovasapian

Hello Prof. Hovasapian
Thank you so much for your detailed videos which explain some difficult concepts very thoroughly. Your videos helped me go from a C to an A+ on my Chemistry tests! Currently, I am taking Honors Chemistry, which is a weighted course and is very rigorous but does not cover some concepts from AP Chemistry. My school does not offer AP Chemistry but I would still like to take the exam in May. Do you have any suggestions for how I can self-study? Also, do sig figs matter in the AP Chem test? My teacher takes points off our tests if we do not use the correct number of sig figs.

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Organic Chemistry
Dr. Laurie Starkey, Ph.D.

I've really enjoyed your lessons, Prof. Starkey!! They're VERY helpful, and they're the best chemistry video lectures I've found!

I also second Nawaphan's comment about possibly covering biological molecules in your lessons. Educator has a biochemistry section, but I think lessons with a chemistry perspective would very useful for us. My OChem class covers these biological molecules, and the last three chapters of my textbook concern these topics. Thank you!

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Geometry
Mary Pyo, M.A.

Thank you Ms. Pyo for making this course effortless to learn. You are the best. Wish every math class on Educator was this crystal clear!!

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Molecular Biology
Dr. Michael Philips, Ph.D.

Dear Mr Phillips just to make it absolutely crystal clear in my mind if, for example in a haploid gamete I have chromosome 1a all thst it contains are alleles?
Now if I take another haploid cell containing chromosome 1b that contains the same allele or an alternative allele, these two haploid cells come together to produce an offspring, will those two alleles produce a gene?
Do you get just half your alleles from one parent and the other half from your other parent and then those alleles produce your genes?
If this is correct then thank you so much, because I have spent quite a while trying to find this answer.
Thank you so much Doctor Philips you are a superb teacher

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Biochemistry
Prof. Raffi Hovasapian

Thank you so much professor Hovasapian, you're so wonderful, seriously! listening to your lecture is the best..... just want to make sure, when we do need ribose, and ribose only, we start from glycolysis, and then produce fructose 6 phosphate, and glyceraldehyde 3 phosphate, and HAVE THESE TWO MOLECULES TO go through non oxidative phase so that they can be turned into ribose, right? According to my study guide. Is this what they mean?  using the non oxidative pathway, but in the reverse direction from bottom to top, reaching ribose. Is my understanding correct? THank you!

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Organic Chemistry
Dr. Laurie Starkey, Ph.D.

You're an amazing teacher. If ever I miss a class I come watch your videos. You make organic chemistry so simple.

Thank you so much

Paula

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AP Biology
Dr. Carleen Eaton, M.D.

thank you! I understood SO MUCH better than what my teacher taught me.... :)

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High School Physics
Prof. Vincent Selhorst-Jones, M.F.A.

Professor, thank you very much for your detailed and helpful reply.  I have not known where to begin, and you have outlined it excellently.  I appreciate it a lot. - Best regards, Francisco

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AP Calculus AB
Prof. Raffi Hovasapian

Hi Professor Raffi. I am a student self studying for the AP Calculus AB exam in May 2016, and I just wanted to thank you for your great videos. They really explain the concepts well and give me confidence to study for this exam in the comfort of my home.

I was wondering if you have any advice as to how I could best study for AP Calc. I am hoping to get through the AB course really soon (I have graduated from high school and am just taking this course to prepare for university level calculus). I do have a lot of time on my hands so I am only focusing on AP Calc. Do you think it is a good idea to progress to AP Calculus BC if I manage to complete the AB course in the next month? Thanks very much.

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Pre Algebra
Nancy Fung, M.Ed.

Dear Ms. Fung,

I love your teaching style! I am using Educator.com to refresh myself after 20 years out of high school. I am getting ready to take my SAT, and want the best score possible. Your courses are really helping me!

Thanks,
James

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English Composition
Prof. Joel Gonzaga

you're the best teacher ever. Helped me a lot with my college writing! Thank you. And by the way, you are way better than a typical college professor.

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Statistics
Dr. Ji Son, Ph.D.

you're a lifesaver. best teacher ever.

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Differential Equations
Dr. William Murray, Ph.D.

great teaching professor. I have learned so much from your videos. I cannot thank you enough. I have a question. Starting at 17:30 on this video you saying that you see 2,6,and 4 at the denominator, but all I see is 2,6(3*2=6) and 24(3*8=24)am a little bit confuse as where do you see the 4. Once again thanks.

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AP Physics 1 & 2
Prof. Dan Fullerton, M.S.

Hi, I self study physics while in High school and I would like to say you are a truly remarkable teacher, I love your enthusiasm and the motivation you have brought me
Thanks so much!

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Organic Chemistry
Dr. Laurie Starkey, Ph.D.

Your lectures are extremely helpful. Thank you so much!
~Natasha

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Organic Chemistry
Dr. Laurie Starkey, Ph.D.

I FEEL BAD I DID NOT PURCHASE EDUCATOR.COM IN THE BEGINING OF THE SEMESTER BUT I THINK YOU ARE SUCH A GREAT WONDERFUL HELP. THANK YOU SO MUCH.

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AP Physics C/Electricity and Magnetism
Dr. Radi Jishi, Ph.D.

This is really great, you guys are the best.
I like how he solves practical examples after illustrating the physical concepts of the lesson.

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Organic Chemistry
Dr. Laurie Starkey, Ph.D.

educator.com has the best professors.

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Algebra 1
Dr. Carleen Eaton, M.D.

Excellent, excellent I love it thank you so much Dr Carleen you me bless with your knowledge; I also found your video us full

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AP Chemistry
Prof. Raffi Hovasapian

Professor Raffi, I have been watching your videos since I started chemistry last fall and they are simply excellent!! I would also like to add that I received a B+ in my first 200 level chemistry course, through distance ed, and i believe your lectures have a great deal to do with that!! Only 4 more chemistry courses to go.... So again, thank you so much!!

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