What direction does the motors move when I put in a positive number. Will it move clockwise or counter clockwise. Pictures would help
Postive = counter-clock wise
Negative = clock wise
It depends on how you are looking at the motor. If you are looking at the motor where the axle is inserted, @The Black Knight is correct.
I tend to describe it to my students by pointing at the green back, as you are often trying to figure out which motors to reverse in setup after they are installed, and the backs are easier to see. If you are looking at the back, the axle extends out of the E in VEX, and V is negative, X is positive.