word - Me, I am circumference

Here is a puzzle in the same form of my previous puzzles, here and here.

Me, I am circumference,

My anagram is what you should do,

My anagram's homophone is what you do in school,

My anagram's other homophone is a ceremony, often in religion.

Answer

You are

GIRTH - the measurement around the middle of something, AKA circumference

My anagram is what you should do,

You should do what is RIGHT

My anagram's homophone is what you do in school,

In school, you WRITE a lot of things

My anagrams other homophone is a ceremony, often in religion

A religious ceremony can be called a RITE

@QuantumTwinkie (using your anagram's other homophone's anagram):

I hope you never TIRE of making these puzzles! =D