RE could stand for Religious Education. That would be, éducation religieuse, in French. This class doesn't exist in public schools and is not mandatory in private, religious ones.
re
Re.
"Cal sup re" means nothing in French.
"Arrière-grand-mère" is how you say great-grandmother in French.
The word for "grandfather" in French is "grand-père" and the word for "grandmother" is "grand-mère."
Religion
My great-grandfather is mon arrière-grand-père in French.
Mother is "mère" in French.
"arrière-grand-mère"
Où est le cimetière / où se trouve le cimetière ? are French translations of "where is the cemetery" in French.
The French word for brother is Frère. The F in frère doesn't stand for anything.
bitter in French is 'amer, amère'