FRENCH OIB (OPtion International du Baccalaureat) and NCAA core course requirement conversion

How many years of schooling did the transcripts cover that you submitted to the American university?

I am asking because Lycees are typically 3-year schools, while American high school covers 4 years. I wonder if your son could document the 2nd required year of math from the last year of the school he attended prior to the Lycee?