41. St . John's offers Advanced Placement courses in nearly every department, and many students take these college preparatory classes . 42. Ernotte attended preparatory classes at the Lyc�e Hoche in Versailles, before graduating from the �cole Centrale Paris in 1989. 43. But officials expect only 10, 000 to 12, 000 of the 85, 000 ninth-graders to take these preparatory classes . 44. In 1973, the school added Hong Kong university preparatory classes and a math / science programme to its offerings. 45. Preparation for the " concours " takes place in preparatory classes which last two years ( see grandes �coles ). 46. The preparatory classes with highest success rates in the entrance examinations of the top " Grandes �coles are highly selective. 47. In 2009 the increasing number of students taking university preparatory classes applied to public universities due to the late-2000s recession. 48. Gary School Superintendent Mary Guinn said Boyd was a quiet student with academic promise who was taking college preparatory classes . 49. Students are recruited by a competitive exam open to students of the preparatory classes of the best engineering grandes �coles. 50. Preparatory classes start at year 9 but it is possible for students to take up the cycle in senior high school.