This post will give information for people who would like to go to  learn French in France, but before giving information about French  schools we will first introduce the 
Common European Framework of Reference for Languages and the different certifications of French-language.
The 
Common European Framework of Reference for Languages: Learning,  Teaching, Assessment, abbreviated as CEFR, is a guideline used to  describe achievements of learners of foreign languages across Europe  and, increasingly, in other countries.
The Common European Framework divides learners into three broad divisions which can be divided into six levels:
A Basic Speaker
B Independent Speaker
C Proficient Speaker
The CEFR describes what a learner is supposed to be able to do in reading, listening, speaking and writing at each level.
level 
 | 
description 
 | 
| A1 | Can  understand and use familiar everyday expressions and very basic phrases  aimed at the satisfaction of needs of a concrete type. Can introduce  him/herself and others and can ask and answer questions about personal  details such as where he/she lives, people he/she knows and things  he/she has. Can interact in a simple way provided the other person talks  slowly and clearly and is prepared to help. | 
| A2 | Can  understand sentences and frequently used expressions related to areas  of most immediate relevance (e.g. very basic personal and family  information, shopping, local geography, employment). Can communicate in  simple and routine tasks requiring a simple and direct exchange of  information on familiar and routine matters. Can describe in simple  terms aspects of his/her background, immediate environment and matters  in areas of immediate need. | 
| B1 | Can  understand the main points of clear standard input on familiar matters  regularly encountered in work, school, leisure, etc. Can deal with most  situations likely to arise whilst travelling in an area where the  language is spoken. Can produce simple connected text on topics which  are familiar or of personal interest. Can describe experiences and  events, dreams, hopes & ambitions and briefly give reasons and  explanations for opinions and plans. | 
| B2 | Can  understand the main ideas of complex text on both concrete and abstract  topics, including technical discussions in his/her field of  specialisation. Can interact with a degree of fluency and spontaneity  that makes regular interaction with native speakers quite possible  without strain for either party. Can produce clear, detailed text on a  wide range of subjects and explain a viewpoint on a topical issue giving  the advantages and disadvantages of various options. | 
| C1 | Can  understand a wide range of demanding, longer texts, and recognise  implicit meaning. Can express him/herself fluently and spontaneously  without much obvious searching for expressions. Can use language  flexibly and effectively for social, academic and professional purposes.  Can produce clear, well-structured, detailed text on complex subjects,  showing controlled use of organisational patterns, connectors and  cohesive devices. | 
| C2 | Can  understand with ease virtually everything heard or read. Can summarise  information from different spoken and written sources, reconstructing  arguments and accounts in a coherent presentation. Can express  him/herself spontaneously, very fluently and precisely, differentiating  finer shades of meaning even in the most complex situations. | 
The 
Test de connaissance du français (TCF) is a language placement test for non-native speakers of French.
It  fulfils French language entry requirements, can be used to demonstrate  language ability for job applications or for personal use.
The TCF follows the European standards for language tests as set forward in the 
Common European Framework of Reference for Languages and is equal to 
DALF.
Lowest level is A1 indicating beginner, top fluency levels are C1 and C2.
Level  C1 and C2 indicate advanced mastery of French. French university  Sciences-Po uses TCF level C1 as the primary language prerequisite for  evaluating the abilities of non-native speakers to follow academic  discussions and carry out academic research in the French language.
The 
Diploma of Advanced French Language Studies (known in French as the 
Diplôme approfondi de langue française, or DALF) is a certification of French-language abilities for non-native speakers.
The "Proficient User" divisions are certified by the 
DALF.
The 
Diplôme d'études en langue française (DELF) (English: Diploma in French Studies) is a certification of French-language abilities for non-native speakers of French.
It is composed of four independent diplomas corresponding to the first four levels of the 
Common European Framework of Reference for Languages.
Here  is an example of the requirement to be admitted as an undergraduate  student in a French university, here at the Universite Jean Moulin Lyon 3  in Lyon:
- TCF DAP : level B1 and a minimum of 9/20
 
- TCF Grand Public : minimum level of B2
 
- DALF C1 or C2
 
- DELF B2
 
Here  is a selection of French language school in France which offer normal  courses and also courses to prepare the different certifications of  French-language test:
The 
Eife2f  — French language school in Lyon for foreign students offer normal  courses from beginner to Advanced and also prepares students for the  Delf and Dalf exams.
http://www.eife2f.com/french-course-in-france/language-school-to-learn-french.html
The 
Inflexyon school in Lyon has offers specialized for each student.
- Preparation for DELF, DALF, TEF and other exams
 
- Specialized french
 
- Small-sized class, private classes, night classes
 
- Preparation to be a french student
 
- Practice speaking and writing
 
- Meet french people
 
- A school to prepare life in France.
 
http://www.inflexyon.com/en/the-school/
The French Language and Culture Institute (ILCF)  belongs to the Literature and Languages Department of the Catholic  University of Lyon. It offer different courses and preparation for DELF,  DALF, TEF and other exams and has been approved as an Official  Examination Center for various French language diplomas.
http://www.ilcf.net/french-courses-in-lyon-france-learn-french-french-classes-delf-dalf-tcf-ccip-exams-42222.kjsp
The 
Accord Language School in Paris
 offer different courses and cultural activities and can arrange accommodation.
http://www.french-paris.com/uk/info/school.php
The 
Paris Langues in Paris
 offer different short term courses and cultural activities and can arrange accommodation.
http://www.parislangues.com/
The Centre de Français Langue Étrangère (CFLE) is part of the University of Poitiers and offer Full time courses and Part-time courses.
http://cfle.univ-poitiers.fr/spip.php?article75&lang=en
The Alliance Française Paris Ile-de-France  offers different types of courses covering all levels of French  learning, from complete beginner (level A1) to autonomous (level C1),  workshops personalized and Professional  classes.
http://www.alliancefr.org/en/who-are-we