basically as long as u show up each wk, you'll have an A...that is if u try during labs...bad things, he is a blah kinda guy, can't make him laugh much...class wise, missin a wk can affect your grade,but tests r group effort(easy)labs r hella easy, and its once a wk!I preffer kenyon for astro though

He can be boring at times. He really loves what he does. He is helpful, if you ask. he offers extra credit too. I got an "A". It is possible, if you work. midterm and final are not bad!

To tell you the truth, I really enjoyed this class. He explains everything so you understand and it is very interesting. As long as you do all your work, you'll be fine.

It's impossible to fail his class. there's a ton of extra credit, and it's a fun learning environment. Dunn is better the Houpius!!

Professor Dunn is very nice and helpful. I think all astronomy 10 classes are set up the same so I don't think he's any easier or harder than anyone else.

Class was interesting. Homework is really easy, the class usually did it all together during lab time. Make sure to look over the parctice questions at the end of the chapters, that's where he gets ALL of the midterm and final questions from!

Probably the best instructor I have had at this college. He is a little dry at first, but he has a great sense of humor and is a genuinely wonderful human being. He is extremely helpful with the homeowkr and really seems to want his students to succeed. If you take Astronomy, take this guy.

This class is practically non-existent because of the minimal work load. Mr. Dunn has a nervous laugh, you can tell he likes what he's doing. means well. with all the extra credit the A is sugar coated.

He is a freakin savage. This guy will trash the stupid people. Recommend sitting close and you'll pick up on the subtlties. Very helpful, and it is a good thing to suck up. Brownie points are good for this guy.

My favorite professor at sierra. Like i've read before, he is geniunely wonderful human being, and so kind. I honestly dont get astronomy at all, and he knew that. he went over the moon 'excuse my pun' to make sure i got the basics at least.He wanted so bad for me to do well, and i got an A:)I just cant rave enough about him!

Really cool guy! Very genuine and sincere in his delivery of the material. Some of the stuff is really out there, but I found it to be very interesting. He's the guy to take!

The first few classes hit you like a 1 ton bus. He talks fast and doesn't have enough class time for anything else. However!! During his office hours he'll answer any of your questions!! Doesn't seem annoyed to go over things he's already explained. Never had a teacher who spends so patience and time with me. Take him. But do it this way.

Professor Dunn, was very helpful and nice. He likes Star Wars as do most Astronomy Teachers. I liked him alot and if you come to class and try every day and He will like you. Take His class

Awesome professor. He's funny in a nerdy way, but don't push his buttons. If you pay attention and don't disrupt, you won't have any problems. HE IS EXTREMELY HELPFUL! He goes over the math problems for the homework every week, and is happy to assist you with any other questions. (Even on the midterm/final!)

I really liked Prof. Dunn. I learned a lot in his class and I would recommend taking it with him. You have to read at least one chapter a week in the textbook, but it is interesting. There is an online assignment every week too. It is important to show up to class because you get points for doing so and for third hour. Lots of extra credit too.

Awesome professor. Very nice and helpful. Nothing hard, just show up pay attention and do the homework. He'll go over the homework with you after class if you need any help. If you have any questions, you can email him. Hes pretty quick to respond to emails. I learned alot and enjoyed the class. Easy A if you apply yourself

He does talk quickly, but he uses powerpoint slides, so that's not really a problem. He is really enthusiastic about the subject, especially Saturn. Made class very interesting, and practically gave you the answers on memorizing the stars by practicing with you. Online tests were tough, but final was in class, so if you studied you can do well.

Overall good guy and very knowledgeable about astronomy. Attend class because you get 10 points a week plus 5 for third hour, homework is online and is a bit annoying. There are two exams and a few star finals. I thought he was a good teacher as long as you attend class you should be fine, make sure you do the online homework as well.

Just had him as a sub-in for Demarzi's class. I'm pretty sure half the people in the room were making jokes about him being on cocaine. Like, a lot of cocaine.

This was the first astronomy class I've ever taken and was extremely hard. The math problems were impossible and there isn't time to ask questions since his lectures take the entire class time. He is wiling to help you out of class but he doesn't explain things very well.

Really good professor, he is always very pleasent and happy and willing to help you. He is also very passionate about astronomy, which makes learning it more interesting.

I took his online course and it was pretty standard. Homework due each Friday via email and MasteringAstronomy (OL textbook companion). Everything was based on the text and star charts. He was extremely helpful and responded to email questions quicker than most. I would take a class from him again.

He is very passionate about his profession and is extremely helpful! The nights where you get to see the stars are beautiful and inspire you to get your own telescope. There are many opportunities for extra credit and he genuinely wants you to do well.

Good Professor you should take his class. I miss only one class,and I was late to class once. I came out with an A. Homework is easy if you read the book or online book. He even helps on at least 5 question from the Homework.

Passionate about his teaching and makes it fun for the class. very interesting!

This class is hard to take online. It really is a class that should be on campus if you have a hard time with science. Prof Dunn is really helpful and wants his students to succeed. In order to do well in this class, you must take advantage of the discussion board, read all of the documents he provides, and read the chapters every week.

Prof. Dunn is a really nice guy. He is extremely passionate about astronomy and has a ton of useful information to share. The class itself doesn't have much homework (only 1 online assignment with 20 questions weekly), and the lectures are interesting to follow. I'd definately recommend him.

Dunn knows his stuff. An easy class, minimal homework and the only tests are MT and final. He explains things very clearly and loves to answer questions. He is a little odd though...

David is a great teacher! He may come off a little weird, but overall is a hilarious and knowledgeable teacher. I would take his class again. TAKE HIM if you can! He makes Astro actually fun. :)

I had David for both Astro 2 and 14. He is extremely knowledgeable in the subject and will answer any question very accurately. He's a really nice guy as well. David is a really good academic teacher, I definitely learned a lot in his class and would recommend him.

Prof. Dunn is a great teacher. I learned a lot in this class. Homework is online, but straight out of the book, and he even stayed after to help out with some of it. An easy A if you put a little effort in, and the midterm and final were fairly easy. Knowledgeable professor. I highly recommend him.

He was a great teacher, he did come off a little dorky but knows alot about Astro and is VERY helpful if you dont get a topic. Made Astro really fun

Dunn is a very interesting teacher and is extremely passionate about Astronomy. Definitely recommend. He is quirky and just a delightful person.

Really easy going guy and is passionate about the subject. The class consists of weekly homework that's done online and two exams. The homework can be a little hard, but it allows you to take second guesses on questions to get partial points. A study guide that's the exact same as the exam is given, so a little studying makes the exams a breeze.

Let me put it this way: he gives you the answers for the midterm and final. Everything is very straightforward. Professor Dunn is a fun guy in a kind of quirky way. :3 He always, always helps you with any questions you have, but he is kind of a stickler when it comes to attendance. Don't miss class or else you miss out on valuable points!

Very knowledgeable professor in astronomy. I'm no science student but I passed it! Homework is mandatory and if you don't turn in your homeworks, it'll hurt your grade. He gives you 1 week to submit. Each midterm and final consist of a solo and group test. Fantastic. Good luck folks. Make the best out of it!

Took Astro2 with him and overall was pretty easy, came to class late, never opened book, did online hw, memorized all stars, constellations., etc. If you do that, you'll get an A

Very Interesting, very fun, and very dorky. Great teacher and an easy A

great prof. very helpful very passionate about subject. would certainly have as instructor again.

I like prof. Dunn. He is fun guy . Quirky like others have said, but he is a cool guy, just like all the astronomy teachers at Sierra college. I like all of them. If you take astro 2 take it with dunn though, he got his PHD researching the rings of saturn, so planetary science is his specialty.

Took online would have rather taken at the campus since he is a very interesting prof, I felt I missed that online but he is super helpful.

Go to class, turn in assignments, show a general level of interest and you will earn an A. Nice, knowledgeable professor, has kind of a sass with people that are either incompetent, or challenge him. Good class for units/transfer.

I totally love Dunn. He was recommended to me by a fellow volunteer at a museum I worked at. I love astronomy as it is, but he was definitely one of my favorite professors. He loves the subject and is pretty nice. Kinda quirky which I enjoy too. Very willing to answer any questions. The tests and hw are really easy.

Dunn is everything a great instructor should be - likes what he is teaching, EXTREMELY helpful on all fronts, available to students, not a push over, yet not overly complicated. If you do the assignments, you will get an A. He will bend over backward to help you if you want help. He wants to see students succeed. What more could you ask for?

Had this class OL. General work is very easy. He's very helpful and you actually learn a few interesting things.

About ~15 question HW due every week, all answers can be found in textbook. No tests, just midterm and final which he gives study guide for w/ the same exact questions. memorize the answers and you'll ace it. Gives EC if you attend a meteor shower or something. Great professor, would take him again if i needed another astronomy class.

Took Prof. Dunn for Astrophotography. VERY fun class, also pretty easy. There's some credit for attendance, which is to say minor assignments given every class that add up quickly. Make all the observing sessions too, they're a lot of fun anyways. A midterm, a final, and a portfolio is about as hard as the class gets.

Super easy. 15 OL questions which are easy to find, a mid-term and final where he gives you the questions weeks before hand (re: memorization of answers.) Totally nice guy who is passionate about what he teaches, but doesn't hold students to the same standards he would hold himself. I would highly recommend him.

I really liked David Dunn. Attendance is mandatory and you are almost guaranteed an A if you attend every class. No tests. 1 midterm and 1 final but he gives all the questions that will be on them prior and you just have to memorize them. He also offers extra credit. He is knowledgeable about the subject and I would suggest him to everyone.

Professor Dunn is by far one of the best teachers I have ever had at Sierra College. He is helpful, interesting, and very caring about his students. Make sure to establish a relationship with him and attend viewing sessions. I would definitely take another Astronomy Class with him just to have him as a teacher.

Professor Dunn is an awesome teacher! His homework is all online and very simple if you do the textbook reading. He also stays 20 minutes after class to help you on whatever homework questions you have. He's also very funny. However if you leave class early or show up late without letting him know, he will call you out in front of the class.

Dunn is one of the best professors I've ever had. He is very helpful and polite. He doesn't expect you to know everything. He gives you a study guide for the final that has all the test questions on it. Highly recommended.

Hands down, BEST class I've taken here at Sierra College! Professor Dunn is amazing! He is extremely passionate about astronomy, so his lectures are always interesting and fun. Also, he is always glad to help out students. Highly recommend this class!!! My love for astronomy was definitely rejuvenated after taking this course.

His more on the geeky side and loves what he teaches. There is a lot of notes but they are all in the packet you need to order in the class. Most of the questions on the online tests are not difficult. On your last lecture day of every week he goes over some of the questions that are on the test after class. Stay for that! There's extra credit.

Tough class, but Dunn is a wonderfully passionate teacher.

Is a passionately goofy teacher, which is a good thing. Class is pretty easy as long as you get all of your stuff done and show up to every class. The Astronomy dept. has their stuff together, so that makes keeping up with your grades and stuff easy.

Dunn teaches for the visual learner, his use of strong hand gestures and hands-on-activities really helps "us artist types!" Opportunities for Extra Credit. Dunn really wants his students to learn so he helps them, sometimes just by giving them the answers to in class assignments! He is a photographer and passionately hilarious! I loved this class.

Great and funny teacher, loves questions and he stays after class to help with the math portion of the homework. All homework is online or in classthird hour, the only take-homes are for midterm and finals. Lots of extra credit available.

David Dunn is a smart teacher who is passionate about astronomy. However, he is also very rude and disrespectful to students at times. He can be very condescending if you come into class late or interrupt the class for any reason. He is more like a high school teacher due to these reasons. Do you forget that we are the ones paying for the course?!!

This was a very easy online class, there is a weekly homework assignment and a midterm and final with group parts.

Cool teacher! Definitely knows his stuff. Midtermfinal were the only difficult parts of this class but as long as you do well on those and do all the homework it's an A!

Professor Dunn is awesome! He does his best to make sure his students have all the opportunity they can get to get a good grade in his class. There is homework weekly online, but it is easy and he offers help after class weekly on it. There are 25 points of extra credit available! Show up to class, do your homework, and you will do great!

Honestly if your looking for credits or looking to learn about astronomy this class is a must. For me just looking for credits and not caring to much for the material it was an easy A. all the homwork answers are online and the midterm/final are cake. the only one i failed was the stars and constellation final due to ditching. Still got an A

Interesting class, a lot harder than expected but overall enjoyable class. I advise a few math classes behind your belt before taking. He does offer 25 points of extra credit which is great. No discussion boards, open forum for help, responds quickly to emails and forum and has roughly as two assignments a week.

There's really no excuse as to why anyone should not be able to get an A in this class. The homework answers are all online, he gives you the multiple choice questions and answers for the final and midterm before, and the accompanying third hour questions are all very easy. Dunn respects his subject and expects that of his students too.

The Astro department as a very strange system set up that allows them to teach cookie cutter classes that they can put little effort into. Dunn did his best working around it and helping out his students. His class that I was in finished with 14 As, 16 Bs, 5 Cs, 2 Ds, and 3 Fs, and 12 people withdrew. Easy A if you turn in everything.

Amazing professor. Loved his class. Gives lots of work and reading but he's very clear on what he expects form his students. Just do the work and you can pass. He gives extra credit to help with your score and he's usually quick to help out when you need it or have questions. Would definitely take another class from him.

This was such a fun class. I learned so much about astronomy and I find myself paying more attention to the sky and appreciating what I see a lot more. Dunn is a goofy and awesome teacher, if I could take another class with him again I would love to. Overall easy class as long as you attend class and pay attention.

This was an amazing class. I didn't know anything about telescopes, cameras, or post processing programs before this class, now I know a ton and appreciate astrophotography so much. There isn't much else to say except that this class is super fun and going on nightly observing trips Thursday nights are one of the highlights of my college memories.

This guy always had me dying from laughter. He is very goofy, but this class sparked my interest of astronomy and I caught myself watching Cosmos with neil degrasse tyson because of this class.

This is a great class, but not enough time during the semester to work on photos. I suggest copying your photos to a flash drive, and working on them at home. There are 4 or 5 telescope photography outings at night that are all group work. The downside is that with too many hands on the telescope, and camera it is difficult to get quality photos.

Good guy.

The most eccentric teacher I've ever had. Really cool though. He's funny but can be a bit blunt/impolite. Class isn't hard. Just do the online homework. He gives out a study guide that consists of the exact questions he asks on the midterm and final word for word. All of the answers are online. It's actually hard to fail this class.

Professor Dunn is amazing! Easiest class ever. Show up to class, do your work, try on your tests, and you'll pass. He makes this class exciting and fun. Wouldn't want any other teacher for astronomy.

He was very strict about no phones, but other than that, he was overall a pretty good professor. He does take attendance every day and can sometimes crack a joke. Basically, you either like him or don't. There's no in between.

I took this class online and professor Dunn strength is how fast he responds to any questions you have either through email or the discussion board. Puts in the grades every week very fast. Two assignments a week. One is with smart book and is 20 questions, the other is his questions and there are 15 of those. Midterm and Final are only tests.

Awesome teacher. Loves what he does and it rubs off on the class. The lecture is in the planetarium. Also leads the Astronomy Club which is awesome.

Professor Dunn makes his lecture enjoyable even though the material can be hard to understand sometimes. The tests were really straightforward and there was a little hw every week. He helps you review a lot for the final. Overall great class!

The class is not too difficult if you simply follow along. I took this class online and it did not feel as demanding as an in class course. I would take him again due to his straight- forwardness and willingness to help on any assignment you need and provide hints etc on every aspect of the course. Very organized and responsive.

Course consisted of weekly quiz of 21 questions (super simple), 20 weekly questions based on galaxy maps. Midterm and final werent too hard. The class is super interesting and he offered a lot of extra credit. I would say this class was an easy A as long as you did all work which wasnt too hard once you got comfortable with the maps.

An amazing professor! Very passionate about this subject. Lectures are kinda boring if you're not interested in the topic, but he does his best to make everything entertaining and to explain things. Relatively easy A if you do the online homework and go to the lab.

The class was pretty chill. You showed up at the auditorium for 2 hours and 1 hour in the classroom. The midterm and final were super easy. Do not have your phone out since it irritates him. The hw was sometimes funky, but you can always get an A since it was online. I think he is the easiest astro teacher to take.

Professor Dunn is a really nice guy. If you participate regularly in class, he will like you a lot, especially since people tend to take ASTRO just to fall asleep in the planetarium, say hi everyday and you're good. Make sure to use the study guides he hands out, as they are literally the tests, but rearranged.

This class was taken 100% online (COVID-19). You could tell the professor preferred on-campus teaching because of the use of planetarium and hands-on telescope experience. However, he seemed to adapt really well to the conditions. Provided online recorded lectures, additional videos for math problems, regular office hours & fast email response.

Prof Dunn is a real star. He deserves his own jovial or terrestrial planet for all the hard work he put into Astro2. I was scared of the math that is needed in Astro but he explained everything very well. Now I know how to calculate green house gases and find out the light gathering power of a telescope. Prof. Dunn will inspire you so do the work!

He gives a good amount of extra credit and its easy to do. He has a lot of reading and a fair amount of lectures but its obvious he's passionate about teaching and he does his best. The homework is kind of easy as long as you made sure to read AND watch his lectures. Some of his assignments are poorly worded and that causes confusion, so reach out.

Professor Dunn is very passionate in this topic. His midterm and finals are very difficult, but a lot of your grade comes from in class papers. Basically given points if you come to the lecture. Lots of EC opportunities. I learned a lot in this class, and was definitely worth my time! He is admirably geeky in his demonstrations. Entertaining!

The math is hard but hes so helpful with it if you stay after class. Lots of extra credit. Im not an A student but this class was easy all you have to do is do the homework and come to class because he grades on that. Also a funny guy, and loves answering questions. Would take his class again forsure

David is a pretty good professor, I definitely can tell he is passionate about teaching astronomy, and while his jokes and mannerisms do sometimes come off as a bit embarrassing, he is very engaging and entertaining. My only complaint is that he will often ask questions, and if you answer incorrectly he will kind of make you feel dumb.

Great professor with informative and helpful lectures

Super cool professer, I dont like funny professers its makes me mad because they dont get to the point but he was actually very straight forward and assignments are easy. Asking for help is scary for me but hes not a very scary person.

Made me fall in love with astronomy! I took the basic lecture as well as Astro 14 (An astrophotography lab) at the same time. He's a very vibrant and energetic professor who will go out of his way to help you if you need it. I could tell he really, truly cared about the material he taught, and he was incredibly enthusiastic about it.

Very clear structure for class. If you kept up with the work in and out of class you will be fine. He's very passionate about the subject but sometimes it gets to the point where he may get impatient if you dont understand.

Professor Dunn is a passionate, if sometimes impatient, astronomy expert. While the math can be challenging, he offers great support and extra credit. I found unstuck study really helpful for class prep alongside the textbook.