Honestly, I feel that there are very few kindergarten teachers who are not imaginative and who hasn't been educated about different learning styles. If your daughter is bored, she still needs to know how to focus on the task at hand. And teachers who are any good can see the difference between "bored" and "cannot focus." They are not the same thing. One lands you on medication and the other in the gifted/talend program.
When she is at home, how does she spend her time? Is she flitting around or watching tv/computer games? Can she sit through a story, a board game, a card game? Does she wander off leaving her artwork unfinished? Does she make her bed, do simple chores around the house through to completion?
I wholeheartedly believe that except in very severe cases, focusing and concentration can be taught. So here is what I would do:
1. Turn off the tv. Completely.
2. Turn off the computer games. Completely.
3. Play simple board games every evening...stuff like candy land, war with cards, chutes and ladders...and quitting is not allowed. Make it very fun and include siblings and other parents.
4. Start having story time. Get books with chapters and start reading to your child. Simple stuff like Magic Treehouse...then at the beginning of every chapter have her tell you what has happened so far...then have her tell you what she *thinks* is going to happen next... then read the book. While you are reading, she has to snuggle up to you and sit still. When she can accomplish that, then have her color/draw while you read. After you finish the chapter, review the chapter with her. (What happened? What did you think/feel about...?)
5. Start her on some chores. Do not tell her what to do... do it with her. Start making her bed with her. Every morning. Have a song you sing while making the bed. She will get better and better and then she has to do it herself after a week or two of you (cheerfully and having fun) doing it together. Then start another chore...like setting the table. If she doesn't do this, draw out on manila paper all the elements (life size) of each setting and lay them in the places. Then she has to put each thing on top of the drawing. She will have to concentrate and after a while won't need the drawing. Chores (that are made FUN!) are a very important part of learning to concentrate.
DO THESE THINGS DAILY OR VERY CONSISTENTLY. Taking away the tv/computer games is relieving her of the things that stimulate the brain in a way that lends support to lack of concentration.(Let her have 30 minutes on weekend days, but keep it to a tiny amount.) Slow her life down with the reading/talking/board & card games. Teach her to focus on the task at hand by doing it with her. Put in a garden together and care for it together, with her focusing on what she is doing the entire time. The key here is that you are training, so you must be a part of it. You can't do it for her; you can't send her off to do it herself. You need to do it WITH her.
It is so easy to blame the teacher. But the facts are this: whether your child is super bright or delayed, she has to learn to focus and do the task at hand.