church services at St Denys' Church six days a week; whether this was adhered to is not clear. Religious practice was a stipulation in the 1835 decree, which required pupils to pray at the start and end of each day and engage in daily readings of holy scriptures. However, the emphasis was always on classical education, which likely required instruction in Latin from the earliest times; in 1835, learning the classics was enshrined as the school's primary purpose. In the mid-19th century, Carre's offered this classical education for free, but arithmetic, geometry and algebra were taught as extras at a rate of two guineas per term. Students were enrolled from the age of eight, and were expected to be able to read, write, recite the Lord's Prayer, the Apostles' Creed and the Ten Commandments, and "be qualified to begin Latin grammar". Students had to supply their own equipment, except pens and ink, which were covered by a 10 shilling payment made each term to the school. The school's inspection in 1865 mentions geography and history teaching, although the general standard of attainment was low. In 1876, the curriculum was widened so that it comprised reading, writing, arithmetic, English, mathematics, history, geography, Latin, a foreign language, music, natural science and drawing, with Greek as an optional extra. The County Council supported technical and commercial subjects in the late 19th century, but after 1904 it was empowered to support secondary education in general, allowing Latin and other classical components of the curriculum to remain intact. After World War I, sixth form courses were developed allowing students to commence advanced studies in the arts and sciences. By the 1950s, a wide range were available: English language and literature, mathematics, French, German, Latin, Greek, art, history, geography, physics, chemistry and woodwork; biology was taught at Kesteven and Sleaford High School. Key Stages 3 and 4 As of 2014, the school follows the National Curriculum in years 7–11 and offers a range of GCSEs (national exams taken by students aged 14–16) and A-levels (national exams taken by pupils aged 16–18). The school has no affiliation with a particular religious denomination, but religious education is given throughout the school, and boys may opt to take the subject as part of their GCSE course. Although morning assemblies take place and are Christian in nature, they are non-denominational. Students participate in a number of educational visits and excursions