In France, the difficulty of integrating into a high school is not measured solely by its success rate at the baccalauréat. It is primarily reflected in the ratio between the number of applications received and the number of available places, an indicator known as access rate. The lower this rate, the more selective the institution is. This mechanism applies equally to entry into the second year via Affelnet and access to preparatory classes via Parcoursup.
Access Rate Parcoursup: the Real Measure of a High School’s Selectivity
Media rankings classify high schools based on their baccalauréat results or their added value. These indicators assess the output, not the input. To identify the most difficult institutions to integrate, one must look at the access rate to CPGE published annually on Parcoursup.
This rate compares the number of places offered to the total number of applications. The national median, across all types of programs, is significantly higher than that of the preparatory classes of renowned high schools. Institutions like Louis-le-Grand, Henri-IV, and Saint-Louis in Paris, as well as Lycée du Parc in Lyon, display some of the lowest access rates in the country.
In practice, for these programs, the vast majority of candidates receive a rejection. The filter is not based on an entrance exam but on the analysis of the complete academic record: grades from the first and final years, teacher evaluations, motivation letters, and class ranking. Attempting to integrate Lycée du Parc or Buffon Paris requires a flawless record throughout the entire secondary cycle.
Affelnet and Zoning: How Selection Operates from the Second Year
Even before Parcoursup, access to the second year in certain public high schools in Paris goes through Affelnet, the software for assigning middle school students. Since the 2021 reform, the system awards an IPS bonus (social position index) to promote diversity in the most sought-after institutions.
This reform has changed the composition of high schools like Condorcet, Charlemagne, or Fénelon. Social segregation has significantly decreased according to the report from the monitoring committee in March 2024. The Paris rectorate mentions a reduction in social and academic segregation in public high schools in Paris.
The direct consequence: a good academic level no longer guarantees placement in the desired high school. The Affelnet scoring system combines brevet results, geographical bonuses, and the IPS bonus. Two students with the same academic level can receive very different placements depending on their original middle school.
The Most Sought-After Parisian High Schools via Affelnet
- Henri-IV and Louis-le-Grand, whose international sections and preparatory classes enhance their attractiveness from the second year
- Condorcet and Fénelon, located in central districts, where demand far exceeds capacity
- Charlemagne, whose historically selective profile attracts families from across the academy
Profile of Admitted Students in CPGE: What the Selected Files Reveal
The selectivity of a high school cannot be reduced to a number. It is reflected in the typical profile of admitted students. Documented feedback on Lycée Camille Jullian shows that the files selected for CPGE present very homogeneous profiles: high overall averages over the two years of first and final year, evaluations highlighting consistent work, and ranking in the top quarter of the class.
Examination commissions do not publish a minimum threshold. In practice, candidates admitted to the scientific CPGE of high schools like Saint-Louis or Michelet share several characteristics:
- Grades in mathematics and physics-chemistry well above the average of their class
- Evaluations explicitly mentioning autonomy and sustained work capacity
- Consistency between the specialties chosen in the first year, those retained in the final year, and the targeted CPGE track
This last point is often underestimated. Dropping a scientific specialty at the end of the first year to replace it with a less demanding option sends a negative signal to the commissions, even if the grades remain good.
Selectivity in High School and Territorial Inequalities
The difficulty of integration varies greatly depending on geography. In Paris and Lyon, the concentration of prestigious high schools creates intense competition. Outside these metropolises, some modest-sized high schools display high success rates without being difficult to access, due to a lack of surplus applications.
Selectivity is an effect of demand, not just of educational quality. A rural high school with a baccalauréat success rate comparable to that of Louis-le-Grand will never appear on the list of the most difficult institutions to integrate, simply because the number of candidates does not exceed its capacity.
The Ministry of National Education has also emphasized the desire to improve the map of educational offerings so that students have the same chances across the territory. This ambition faces the reality of school migration flows: families with means circumvent zoning through strategic relocations or requests for exemptions.
CPGE Outside Paris: Less Publicized Selective High Schools
Lycée du Parc in Lyon, Camille Jullian in Bordeaux, or Faidherbe in Lille are among the institutions whose CPGE have very low access rates. These high schools receive applications from all over the national territory, which mechanically enhances their selectivity.
The difficulty of integrating a high school in France thus depends less on its media reputation than on the gap between the supply of places and the volume of applications. The Parcoursup and Affelnet data now allow for precise measurement of this gap, provided that one does not confuse output ranking with input filtering.
