I've got to say, I love my boys' Rabbeim. I may not agree with everything that they say regarding Torah and Yahadus, but I love 'em anyway.
My younger son is in third grade. His Rebbe is simply amazing, but we already knew that from when my older son had him. He puts so much of his own personal time and effort into making learning interesting for the children. The fact that he's techno-savvy is a big plus.
The younger one is starting to learn "Az Yashir" now. So, what did this Rebbe do? He made a PowerPoint presentation where the children can click through one pasuk at a time, see the text of the pasuk and listen to either the translation or with truppe (cantallation), and sent it home on CD with the boys. When the boys started learning Mishnayos, not only did he make a celebration for them (making sure that all the boys participated), but he also made sure to send home for each boy a certificate with a picture of the boy as he appeared that day. In addition, his whole family chipped in to help with the celebration - his wife baked cakes and cookies for the occassion and she was there to help set up. When my son's yeshiva had a father-son brunch, he took his digital camera there, made sure to get shots of all the boys with their fathers (or alternate male relatvies who attended) and then sent home a nice picture of the boys framed with the words of a song that he had taught them for a presentation at the brunch. When they learned the Makkos, not only did they just learn it, but he arranged for a Makkos fair for the children. When nine boys from the class were absent, he conferenced called them so that they could learn together with the class. When my older son was in his class and was out sick for a few days, the Rebbe called him on his cell phone from class and used his own personal cell minutes to make sure that my son kept us as much as he was able during his illness.
My older sons' rebbe is not as tech-savvy as my younger son's rebbe. He doesn't send home pictures of the boys and doesn't send presentations for them. He doesn't call them from the classroom when they are ill. But he makes up for it in the pure love that one can see that he has for the boys. He takes great pains to see to it that every boy is taken care of. He paired my son off with another boy to learn b'chavrusa (together). My son's chavrusa didn't take the responsibility seriously enough (he never called our son, when my son called him he was difficult to get a hold of, etc.) and so we asked the rebbe to switch our son's chavrusa. He did - he took the job himself. For several months, he and my son learned on the phone most nights b'chavrusa. How many grade-school Rabbeim would do that? He arranges for trips for the boys who don't watch TV to meet with Gedolim (and dinner for those that go) on his own time and from his own money. He arranged for all the boys in the class to be able to go to a gym and swimming pool one Sunday night. These aren't among his official responsibilites as a Rebbe - but one can see the love he has for teaching and the love he has for his students. He comes off as just such a warm person.
My sons have had some good Rebbeim in this school, and they've had some downright awful ones - ones who have burned out for years and ones who belittle the children. But these two are so far above any other Rabbeim I have ever met! If only I had such caring, nurturing and thoughtful Rabbeim when I was in elementary/high school - I might have turned out much different than the maverick I have become.