<P> The first stage of secondary education, age 11 to 13 years takes place in the primary school . Upper secondary education is called educacion media in Spanish, it lasts from age 14 to 18 years, and is mandatory . Educacion media is divided into four grades . </P> <Ul> <Li> Primero Medio (First Grade of secondary education) 14--15 years old </Li> <Li> Segundo Medio (Second Grade of secondary education) 15--16 years old </Li> <Li> Tercero Medio (Third Grade of secondary education) 16--17 years old </Li> <Li> Cuarto Medio (Fourth Grade of secondary education) 17--18 years old </Li> </Ul> <Li> Primero Medio (First Grade of secondary education) 14--15 years old </Li> <Li> Segundo Medio (Second Grade of secondary education) 15--16 years old </Li>

Give the spanish for four courses that are offered at a secondary school