Accept/ Except
Mr. Howard is our principle at Lake Howell High School.
Incorrect- Principal- (Noun) Main person or leader
The principal for Pythagorean theorem is area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides.
Incorrect- Principle- Laws of Geometry & Rt. Triangles
One principal I live my live by is to treat everyone equally.
Incorrect- Principle- Morals & beliefs
He was a man that had very high principles.
Correct- Set of beliefs or thoughts
The Principal at the high school used to be a teacher, and his favorite principal dealt with magnetism.
Correct- Principal- Person in charge
Incorrect- Principle- idea or thought