They are = ils/elles sont ; There are = il y a (pluriel)

Application:
about twenty teachers in Bozel school. very nice which is great because not so many nice teachers around! (only joking!)
Mr HADRAMI's students for instance (for example) have good marks. He says committed (dévoués, travailler). Perhaps the reason is that only 23 students in his classes (on average). Actually many more students in other schools, so we're lucky!