Marc Zakharovich Chagall ( sh@-GAHL; born Moishe Zakharovich Shagal; 6 July [O.S. 24 June] 1887 - 28 March 1985) was a Russian-French artist of Belarusian Jewish origin. An early modernist, he was associated with several major artistic styles and created works in virtually every artistic format, including painting, book illustrations, stained glass, stage sets, ceramic, tapestries and fine art prints. Art critic Robert Hughes referred to Chagall as "the quintessential Jewish artist of the twentieth century" (though Chagall saw his work as "not the dream of one people but of all humanity"). According to art historian Michael J. Lewis, Chagall was considered to be "the last survivor of the first generation of European modernists".

In Russia at that time, Jewish children were not allowed to attend regular Russian schools or universities. Their movement within the city was also restricted. Chagall therefore received his primary education at the local Jewish religious school, where he studied Hebrew and the Bible. At the age of 13, his mother tried to enroll him in a Russian high school, and he recalled, "But in that school, they don't take Jews. Without a moment's hesitation, my courageous mother walks up to a professor." She offered the headmaster 50 roubles to let him attend, which he accepted.  A turning point of his artistic life came when he first noticed a fellow student drawing. Baal-Teshuva writes that for the young Chagall, watching someone draw "was like a vision, a revelation in black and white". Chagall would later say that there was no art of any kind in his family's home and the concept was totally alien to him. When Chagall asked the schoolmate how he learned to draw, his friend replied, "Go and find a book in the library, idiot, choose any picture you like, and just copy it". He soon began copying images from books and found the experience so rewarding he then decided he wanted to become an artist.  He eventually confided to his mother, "I want to be a painter", although she could not yet understand his sudden interest in art or why he would choose a vocation that "seemed so impractical", writes Goodman. The young Chagall explained, "There's a place in town; if I'm admitted and if I complete the course, I'll come out a regular artist. I'd be so happy!" It was 1906, and he had noticed the studio of Yehuda (Yuri) Pen, a realist artist who also operated a small drawing school in Vitebsk, which included the future artists El Lissitzky and Ossip Zadkine. Due to Chagall's youth and lack of income, Pen offered to teach him free of charge. However, after a few months at the school, Chagall realized that academic portrait painting did not suit his desires.Answer this question using a quote from the following article:

What did this lead him to do
In Russia at that time, Jewish children were not allowed to attend regular Russian schools or universities.