It dépends on your personal goal. CELTA is intense. It requises an indepth Knowledge of how the English Language works. You teach real student almost immediately. Your are observed and assessed. But it's worth it.

He went to Paris (PS) He has been to Paris (PP) Did he go to Paris? Yas Did he go to Paris? Yes Is he in Paris Now? Yes Is he in Paris Now? No

It dépends on your personal goal. CELTA is intense. It requises an indepth Knowledge of how the English Language works. You teach real student almost immediately. Your are observed and assessed. But it's worth it.