SMAN 15 SURABAYA has many achievements both in academic and non-academic fields. As an example that can be seen from several extracurricular activities at SMAN 15 Surabaya, which produced several awards.

However, behind all of these achievements, SMAN 15 SURABAYA does not underestimate its spiritual and religious education. Because besides all those achievements, SMAN 15 SURABAYA is famous for the title of "Religious School" in the city of Surabaya.

This can be seen from the existence of Christian Spiritual Organizations in SMAN 15 SURABAYA. Christian Spiritual Sie is a gathering of students and students at SMAN 15 SURABAYA Christian which aims to enhance the spiritual attitude and faith in Jesus Christ on the basis of Love so that it is not only successful academically, but also success also in the spiritual as well.

Christian Spiritual Organizations also has several programs to support the purpose of this Christian Spiritual Sie, for example a retreat activity held on January 11 -13 January 2019 held at the Newstart Hotel, Trawas. The Retreat was held with the theme "Youth is Gold", which has meaning about our youth which is a time that must be improved for us as students of SMAN 15 SURABAYA to be role models both in SMAN 15 SURABAYA and in the community.

This retreat has a series of events including worship, gymnastics, outbound, and so forth. This Retreat was also attended by several teachers of SMAN 15 SURABAYA. We all followed with joy.

From programs like this, we can bring peace to our neighbors in the SMAN 15 SURABAYA environment so that we can all tolerate and develop together with our fellow people in SMAN 15 SURABAYA.