 Admission to Carre 's is through the eleven @-@ plus examination and entry is limited to boys in the lower school , although the Sixth Form is co @-@ educational . The total number of pupils on roll in 2013 was 817 , of which 240 were in the Sixth Form . Teaching follows the National Curriculum and pupils generally sit examinations for ten or eleven General Certificate of Secondary Education ( GCSE ) qualifications in Year Eleven ( aged 15 – 16 ) . They have a choice of three or four A @-@ levels in the sixth form , which is part of the Sleaford Joint Sixth Form consortium between Carre 's and St George 's Academy . Of the 2013 cohort , 100 % of pupils achieved at least five GCSEs at grade A * -C and 96 % achieved that including English and Maths GCSEs , the eighth highest percentage in Lincolnshire . An Office for Standards in Education , Children 's Services and Skills ( Ofsted ) inspection in 2013 graded Carre 's " good " overall with " outstanding " features . 
 Admission to Carre <a href='null_genetive' title='1'><mark>'s</mark></a>is through the eleven @-@ plus examination and entry is limited to boys in the lower school , although the Sixth Form <a href='drop_aux' title='2'><mark>is</mark></a>co @-@ educational . The total number of pupils on roll in 2013 was 817 , of which 240 <a href='uninflect' title='3'><mark>were</mark></a> in the Sixth Form . Teaching <a href='uninflect' title='4'><mark>follows</mark></a> the National Curriculum and pupils generally sit examinations for ten or eleven General Certificate of Secondary Education ( GCSE ) qualifications in Year Eleven ( aged 15 – 16 ) . They <a href='got' title='5'><mark>have</mark></a> a choice of three or four A @-@ levels in the sixth form , which <a href='drop_aux' title='6'><mark>is</mark></a>part of the Sleaford Joint Sixth Form consortium between Carre <a href='null_genetive' title='7'><mark>'s</mark></a>and St George <a href='null_genetive' title='8'><mark>'s</mark></a>Academy . Of the 2013 cohort , 100 % of pupils achieved at least five GCSEs at grade A * -C and 96 % achieved that including English and Maths GCSEs , the eighth highest percentage in Lincolnshire . An Office for Standards in Education , Children <a href='null_genetive' title='9'><mark>'s</mark></a>Services and Skills ( Ofsted ) inspection in 2013 graded Carre <a href='null_genetive' title='10'><mark>'s</mark></a>" good " overall with " outstanding " features . 
Admission to Carre  is through the eleven @-@ plus examination and entry is limited to boyz in the lower school , although the Sixth Form co @-@ educational . da total number of pupils on roll in 2013 was 817 , of which 240 was in the Sixth Form . teachin follow the National Curriculum and pupils generally sit examinations for ten or eleven General Certificate of Secondary Education ( GCSE ) qualifications in Year Eleven ( aged 15 – 16 ) . They got a choice of three or four A @-@ levels in the sixth form , which part of tdaSleaford Joint Sixth Form consortium between Carre  and St George  Academy . Of thda013 cohort , 100 % of pupils achieved at least five GCSEs at grade A * -C and 96 % achieved that including English and Maths GCSEs , the eighth highest percentage in Lincolnshire . An Office for Standards in Education , Children  Services and Skills ( Ofsted ) inspection in 2013 graded Carre  " gud " overall with " outstanding " features .