Besides the art school, King Vajiravudh also established the commerce school in 1916, to teach people to trade. It was named Wat Maha Pruethtaram Commercial Vocation School moved to Wat Kaem Jam Fah Lang, so its name was changed to Wat Kaew Jam Fah Lang Commercial Vocational School. The curriculum was constantly improved until the school became known as Siphtaya Polytechic College, as we know it today.