Eleven days after Samuel Paty, during a lesson on freedom of speech, showed caricature drawings of the Prophet Muhammad, he had his head cut off in an attack outside the school in the Paris suburb of Conflans-Sainte-Honorine.
The drawings had previously been published by the French satirical magazine Charlie Hebdo.
The 18-year-old perpetrator was shot dead by the police.
Last year, six teenagers, 14 and 15 years old at the time of the murder, were convicted of helping the murderer to identify Paty in exchange for payment. A sixth teenager, a 13-year-old girl, was convicted of lying about events in the classroom before the murder, which was considered to have led to the crime.
Those who are now standing trial are seven men and one woman. They are accused of helping to procure weapons for the attack and of spreading false information about the teacher and his lesson on the internet.
One of those standing trial on Monday is the father of the previously convicted 13-year-old girl. He is accused of starting a campaign on social media against the teacher after his daughter's claims.
The trial is expected to continue until December.
Today, several French schools are named after Samuel Paty.
