My kid hates going to school!

We have a son 5 years old. He has been in school since he was two
years. His first school was a traditional one. Although he has had
good relation with his classmates, he always found it boring.
Everytime we had to drop him off at the school, he threw a big
tantrum. He usually was ahead of his classmates counting number,
reading the alphabet, etc. But he always complained saying that the
school was just boring. He started having fights with other kids.
Finally, the school asked us to take him home because they did not
know what to do with him. Then, we took him to a Montessori school at
the age of 3 years and half. Since he is a very active kid, he did not
get used to the routine. He always wanted to play and do non of the
regular activities in the classroom. After few moths he got used to
work and followed the teacher orders. However, we were asked to take
him to an emotional and intelligence evaluation. He ended up having a
high level of intelligence and a average level of emotional adaptation
to the group. This unbalance seems to create quite a character. He
does his homeworks (math in particular) but he finds boring practicing
writing. He does not obey his teachers' order anymore. He does not
want to work in the classroom. He does not want to take any of the
practice test required by the school. He only works at home. He just
want to stay at home. He loves watch books, computer, TV
documentaries. In particular, about animals and dinosaurus. He always
want to read a book and play with his toys. We are almost tempted to
keep him at home and find a private tutoring. The guy is smart but he
always finds the school just boring. The school is almost to give up
on him. We won't. Sometimes we get angry at him for not cooperating.
But at the same time I do not see the school creating a fun
environment for learning. We do not know what to do. Should we keep
him at home and find a private tutoring or look for another school
with the uncertainty that he does not adapt. We believe that this is
just a matter of time, before he mature emotionally. But in the
meantime we do not know what to do.