Centre Pauline-Julien

This is a government subsidized french school that offers morning and evening classes. Class sizes are typically 25 – 35 students. Students come in from all over the world and it is a very comfortable learning atmosphere. Every level takes 2 months to complete and there are 6 levels in total. If you wish to continue after level 6 there are 3 more levels dedicated to written french. Every class gets a field trip day to explore Montréal, for example a trip to city hall or Apple picking which makes for a fun and sociable experience. I would say the school is very well run. Some teachers are better than others so I suggest getting comfortable with your teacher and if you do not connect with your teacher request a change.

This school is part of the Commission Scolaire de Montréal and offers intensive French classes for immigrants, levels 1 to 6 and Writing in French.
Classes run Monday to Friday mornings or afternoons (20 hours per week) or Monday to Thursday evenings (16 hours per week). Additionally there are less intense classes on Saturday or Sunday morning. These cater especially to parents, aided by the free child care available on site.
At only 50 $ per course, this is pretty much the most affordable option to brush up on your French in Montréal. The school is government subsidized. Keep in mind that if you are not a resident or citizen of Canada, you are only eligible to 6 months of classes at this Centre.
Classes consist of about 30 students each. I found that the quality varied a lot depending on the teacher. Class material is very much tailored to the need of new immigrants, covering topics like job applications or renting an apartment. Thus you learn useful survival skills like how to write a CV or to understand a typical Quebec lease while practising French.