(2) From home, Wang Lexian goes east150m to Yuehu Bridge, then 200 metres northeast to Sakura Garden, and finally100m northwest to school.
(3) The route for Wang Le to go home from school is: first go southeast150m to Sakura Garden, then go southwest 200m to Yuehu Bridge, and finally go west150m to get home.
So the answer is: (1) northeast and northwest;
(2) East, 150, Northeast, 200, Northwest,100;
(3) Go southeast 100 meters to the Sakura Garden, then go southwest 200 meters to Yuehu Bridge, and finally go west 150 to get home.