The officials, who were speaking on condition of anonymity, declined to give more details on the announcements expected tomorrow, when Macron will speak at the elite College de France research centre.
France is to make school compulsory from three years old, President Emmanuel Macron, has announced, insisting that the earlier children are in class, the higher their chances of success and integration in society.
"The name of his attacker will be forgotten, but the name of Arnaud Beltrame will live on", Macron told a national ceremony to honour the officer, one of four victims of Friday's shooting spree in southwestern France.
Both a French and Moroccan national at first, he was then naturalized as a French citizen in 2004 when he was 12, following his father's naturalization.
The hero French policeman who swapped himself to save a hostage during a terror attack last week had his throat cut by the terrorist.
A 17-year-old man described as a friend of Lakdim's who was under his sway, is also in custody over the attack. Amid near-universal praise, Beltrame, a former military member and decorated Iraq War vet, was buried on Monday in a national ceremony with military honors.
Although police managed to get Lakdim to let other shoppers leave, he kept one woman with him as a human shield.
The ministry's boss, Gerard Collomb, maintained Wednesday morning that there were no "dysfunctions" in tracking Beltrame's killer, Redouane Lakdim, who also killed three other people before he was shot dead by police.
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The move to make preschool obligatory is meant to help children in French overseas territories and in poor communities on the mainland remain competitive in the education system, Macron said.
Across the country, police stations will pause for a minute's silence at 4pm Singapore time. Lakdim was eventually neutralized by security forces with the aid of Beltrame's cell phone transmission, but not before he shot Beltrame.
The attacker wounded four other people, including the driver of the hijacked auto and a policeman shot while out jogging.
Rightwing opposition leader Laurent Wauquiez and far-right leader Marine Le Pen have accused the government of a laxist approach to the jihadist approach.
Lakdim, who had previous convictions for drug use and handling a banned weapon, had been on a list of suspected extremists since 2014 and was being monitored.
Prime Minister Edouard Philippe hit back at the criticism on Tuesday.
Observers say the move is more of a symbolic gesture, as the vast majority of parents in France already enroll their children in an école maternelle (preschool) from the age of three, taking advantage of the free system.