It is believed that William Shakespeare would have studied Latin composition and the works of classical authors in grammar school. He's thought to have attended The King's New School of Stratford-upon-Avon.
In grammar school, Shakespeare (1564-1616) would have learned the alphabet, basic reading, the Lord's Prayer and a bit of catechism (religious lessons) from a primer or hornbook. Shakespeare's plays "Richard III" and "King John" both refer to this type of primer.
Latin was the language of scholars in 16th-century English grammar schools. In addition to reading the Bible in Latin, Shakespeare would have also read Aesop's fables, Ovid's "Metamorphoses" and the works of writers from Cicero and Caesar to Seneca and Virgil, among other ancient Roman orators and poets. That education of the classics is reflected by Shakespeare's mention of many of the ancient authors in his works.