The Firstwald-Gymnasium Mössingen is a two-stream, general  education all-day grammar school  sponsored by the school foundation of the Evangelical Church in Württemberg.

In addition to the  G8 grammar school , the advanced grammar school  offers   graduates from the 10th grade the opportunity to obtain their Abitur in three school years.

High school students from Year 5 and up can also use this Year 10+ as an individual gap year (G9) to catch up on technical deficits, to pursue interests in social, sporting or voluntary areas or to gain experience abroad.

With a small affiliated  boarding school  , the school remains true to its tradition as a boarding school and not only offers young people who have to travel long distances or special needs or interests a second home, but also additional, individual support on the way to their Abitur.