Charlene Serrette has been a woman with a mission for several years -- to transfer her passion for math into the heads of her high school students. Her method has been to show enthusiasm in her ...

Rearranging the formula for the circumference of a circle makes the radius the subject. Start with the new subject and write out the function machine for the formula, showing each operation step by ...

The subject of a formula is the variable that is being worked out. It can be recognised as the letter on its own on one side of the equals sign. For example, in the formula for the area of a rectangle ...