Land Puzzle?!

Land Puzzle?

My teacher gave us this puzzle to solve and it gotten quite frustrating.

There is land that must be equally and symmetrically divided among a farmer's four sons. The plot is 8x8 squares with a twist.

On the fourth column going down four rows there are 4 trees and each must son must have at least one tree. The trees are located on the following squares:

(1, 4)
(2, 4)
(3, 4)
(4, 4)

The trickiest part for us is that each division must be equal in size 'and' shape. Maybe you've heard of it before, but I haven't.
And I'm sure you can all do it on your own however you want, but I'm looking for someone who can actually show me how it's done. Good Luck.

1 week ago
...Oh, and the divisions must be whole, no cut ups. Sorry for making it harder, but that's just what it is.

1 1 1 1 1 1 1 4
2 2 2 2 2 2 1 4
2 3 3 3 3 2 1 4
2 3 4 4 3 2 1 4
2 3 4 1 2 2 1 4
2 3 4 1 1 1 1 4
2 3 4 4 4 4 4 4
2 3 3 3 3 3 3 3


I knew that thre had to be some really long runs of land for each son and that there would have to be a U shape in order to give each piece of land the possibility of reaching a tree. I actually did the outside edge of the puzzle first, giving each son a line of seven squares and then figured out a way to get the each to a tree.