 The Lambton Kent District School Board is responsible for the 13 elementary and four secondary public schools ( Northern Collegiate Institute and Vocational School , Alexander MacKenzie Secondary School , Sarnia Collegiate Institute & Technical School , and St. Clair Secondary School ) located within Sarnia 's boundaries . 
 The Lambton Kent District School Board <a href='drop_aux' title='1'><mark>is</mark></a>responsible for the 13 elementary and four secondary public schools ( Northern Collegiate Institute and Vocational School , Alexander MacKenzie Secondary School , Sarnia Collegiate Institute & Technical School , and St. Clair Secondary School ) located within Sarnia <a href='null_genetive' title='2'><mark>'s</mark></a>boundaries . 
Da Lambton Kent District School Board responsible for the 13 elementary and four secondary public schools ( Northern Collegiate Institute and Vocational skoo , Alexander MacKenzie Secondary School , Sarnia Collegiate Institute & Technical School , and St. Clair Secondary Scschoo located within Sarnia  boundaries .