Karl is about helping others understand math. He makes it easy to learn

Makes the course interesting and fun. Sometimes goes too fast though.

Easy grading, not that easy. Got an A. I went to his office only one time. It seems that he made the test easy just for not wanting students to ask him questions afterwards.

all about relating math to real life. will explain stuff over if anyone asks, goes over hw, explains how to do stuff. half of tests are in groups, all tests (and final) open book & notes. makes math fun and interesting.

he is a nice teacher.just take his class. easy to get an A.

Weirdo looking, and the ONLY math teacher I ever met that requires students to write an 500 words ESSAY!!! WTF!!! WEIRDO!!!!!!

thinks everyone is a math major. If you don't mind writting a paper for math and have math posters all over your room, go for it.

It´s actually a 600 word essay that you have to write, but he doesn´t grade the grammar. Very good and nice teacher. He is always 5 minutes late.

He is a great teacher and easy going. As long as you did your homework you should get A in his class. Patience and well organize and interesting class. he is funny too. i took his class for three quarters and i got all A.

I wonder how many instructors are smart to teach math in the math depart in Deanza. I think he is one of those eligible. Althogh he is not good at teaching and his class sometimes seems like an honor class, u d better give a shot on this class. BE SURE to take every note and do every homework

Excellent teacher! The best teacher I have for Mathematic. He teaches very effective ways. His approaches of teaching make you see Math in a practical and applicable way. His exams are very straightforward. If you understand the chapters in a practical way, you will definitaly get A in his class.

Schaffer is probably the best mathematics teacher i ever had, his lectures catch your attention by relating them to real world problems. His tests are very straight forward. if you know the concepts and main ideas, you will pass this class with a high grade. great guy and teacher. take him!

ppl need to quit whining. his tests are OPEN BOOK (even the final!), he goes over hw, he gives breaks, and if you have a question just ask and he will answer it. he wants you to ask questions so you understand. i got an A even though i hate math. give him a chance. nice guy.

Great Instructor. Always willing to help and take extra time to explain things. Extremely Fair. Highly recommend this teacher.

Amazing to watch, not to easy to take - made worse by a cheapo incomprehensible book. Most test/quiz problems not from there. Ridiculously tough and varied material, but he's generous in grading. Knows 5 ways to do anything and every trick. Homework not graded, just pop-checked to see that you're trying. Always interesting, sometimes downright fun.

The man in a genius. The class is not easy but it is the best most rewarding math class I have ever had and i hate math. He is a generous grader and you have TONS of time to do the homework as he only checks it once or twice a quarter. It's math for people who dont want to contiune with math in the Contemporary Mathmatics class.

This guy is bomb...i took him 4 math 22 that class was hard as hell...but this guyz made it so damn easy 4 me...he is the best math teacher i ever had...he wont check hw that much...i dont believe all these -ve comment people made...this guy is math genius math god if i must...i would definately recommend this guy...he knows his stuff...

since i took cal in high school, i am quite familiar with the material. If you have no idea about Cal, you may find difficult for the first two week. He teaches fastly and demands a lot of homework but he grades much easily. Collect hw at the end of every chapter. Never read them but 1st. He only wants to know that you have done somthing.

OPEN EVERYTHING FOR TESTS

He's alright. Open books, open notes, even open laptops for exams. He's a rebel against the politics that goes on in the Math Department. He's also scattered brained sometimes. Pretty easy overall, his exams are just like the practice exams. Do at least half the assigned homework, and you'll do fine.

Fun, well organized; gave me a n appreciation for math that I did not have before; helped to get over my fear of math.

I really have mixed feelings about the dude. On one hand, it is EASY to get a B or better in his class. Open notes, open book, open whatever you have. On the other, I feel I haven't learned anything from him since taking him. He's a cool cat, and is frustrated when the kids don't learn the material. But very lenient and patient. A bit disorganized

great instructor and very passionate about math and the variety of teaching skills. he tries numerous ways to explain the simplest questions. if you want to become a teacher do take his class. i promise you will learn a lot. after taking his class you will feel confident. PS; don't forget to keep a daily journal of the things you learn in class.

His class was super easy. The final was a piece of cake. He is such a pushover and pushes back due dates if you ask. Everyone else who gave him a bad rating probably just hate math. He goes through the theories clearly and knows his stuff. His anecdotes are pretty entertaining too.

I don't know why people rate him so harshly. True, he's a bit unorganized but he is nice. The class is interesting and you learn more than you ever expect!

A bit weird but generally a nice guy. He tries to construct the class for those that have math test anxiety and indeed a lot of work is in the form of written reports,homework and group work fir which you get full credit by just doing. Only 10% 1st test, 10% 2nd test (take home) and 20% final.

He is energetic, excited to have people engaged in the subject. He WILL go over anything you want him to go over. He drops 1 test, homework, quiz. He gives a very hard takehome test encouraging people to work together or with tutor staff. Take him if you want to learn something with the money you spent on the class and your time.

Very nice guy! Most of the class you?re in groups and he gives you a problem (usually from upcoming homework) to work on, then goes over it. Pretty easy class, attendance is mandatory- he will drop you. Easy A if you keep up with all homework and participate

I got a B in the class by some miracle. I bombed every test (C- to Ds) but I turned in all the homework and class assignments. He is very helpful; I thought I was understanding the material until I got my test grades back, but the class is structured so you can still pass even when all looks bleak.

He's really nice and was helpful, if you asked. I thought the class was interesting because of some of the different concepts we learned. Just do the work he assigns and you'll be fine.

Excellent Teacher. I use many of the methods he taught in my classroom.

This is a class where your hard work will pay off. Come to every class and Do ALL assignments and you will pass. The test are not high stakes..3 exams, 15% each = 45% of ur grade. U play games n participate in class..wrk in groups. Write journals..n 2 short papers. But its worth it! U learn activities to use in ur classroom n alternative techniques

Though we were given tons of homework, tests are always based on them. So, it is essential and rewarding to do all of your homework. Pay attention in class and write down all the examples offered, then you will be fine.

Dr. Schaffer cares about his students' success. He is extremely knowledgeable about the material and very approachable in that he welcomes questions. He gives multiple examples to explain a concept, and he caters to different types of learners(auditory, visual, kinesthetic, etc). Take him! He was extremely inspirational. Recommended.