There is no patron saint for 'getting high grades.' However, there are a number of patron saints of students.
Albert the Great
Ambrose of Milan
Benedict
Cassian of Imola
Catherine of Alexandria
Gabriel of the Sorrowful Mother
Gemma Galgani
Gregory the Great
Holy Innocents
Isidore of Seville
Jerome
John Bosco
Joseph Calasanz
Joseph of Cupertino
Lawrence of Rome
Nicholas of Myra
Osanna Andreasi
Philomena
Symphorian of Autun
Tatiana of Rome
Thomas Aquinas
Ursula
Saint Hilda of Whitby is not a patron saint.
There is no patron saint of brains, just patron saint against head injuries.
There is no patron saint of explorers.
Saint George has been patron saint of England as long as they have had a patron saint, Saint Michael was never the patron saint of England, although he is the patron saint of London and Cornwall.
St. Andrew is the patron saint of:AchaiaGreeceRussiaScotland
The Patron Saint Inex lists no patron saints of bears.
A patron saint is supposed to be a protector in the Catholic religion. Patron Saint Angelico is the patron saint of artists. A patron saint is a protector of life.
The Patron Saint Index lists no patron saint of dinosaurs.
As per the Patron Saint Index, there is no patron saint of wrestlers. However, Saint Sebastian is the patron saint of all athletics and athletes.
Saint Lillian is not a patron saint as per the Patron Saint Index.
No, there is no patron saint of billiards.
There is a patron saint of Wales but no patron saint of whales.
There is no patron saint of color.
There is no patron saint of voting.
There is no patron saint of red heads as per the Patron Saint Index.
Saint David is not a patron saint of England. He is the patron saint of Wales.
As per the Patron Saint Index, Saint Cedd is not a patron saint at this time.