Almost everyone except Ron and Hermione - they were in The Chamber of Secrets collecting a lot of Basilisk fangs to get rid of all the horcruxes.
The teachers and students fight side by side to defeat the death eaters and Voldemort.
Ron and Hermione did fight, they didn't miss any of the fight in the Chamber. The majority of teachers stayed to fight along with the Order of the Phoenix members and family close to them. Students aged 17 or over were allowed to stay and most of Gryffindor, Ravenclaw and Hufflepuff did so (Slytherins either left or joined the death eaters). Some younger students even stayed behind. There was also a lot of residents from Hogsmeade that came and helped.
Plus former members of the DA, including Fred and George Weasley (with their family), Cho Chang and Dean Thomas.
Death Eaters and people "of age" from Hogwarts fight. Fred Weasley, Remus Lupin, Nymphadora Tonks & many others were killed
George Weasly is fighting at the battle of Hogwarts.
destroyed
He dies on page 636 at Hogwarts during the battle.
Do you mean after the Battle of Hogwarts? He is never mentioned as dead or even injured, so we can only assume he survives the Battle and continues teaching Charms at Hogwarts.
Presumably, he continued to work as Hogwarts gamekeeper and Care of Magical Creatures teacher.
Hogwarts survived the battle in Deathly Hallows, and remains standing 19 years later when Harry's children attend the school.
George Weasly is fighting at the battle of Hogwarts.
The Battle of Hogwarts took place on May 2nd, 1998.
Towards the end, it centers on Hogwarts for The Battle of Hogwarts.
The Battle of Hogwarts - 2011 was released on: USA: 10 July 2011 (internet)
May 2nd, 1998 marks the date of the Battle of Hogwarts, the death of Fred Weasley whose was killed during, and marks the birth of Victoire Weasley (daughter of Bill and Fleur Weasley) who was named after the victory at the Battle of Hogwarts.
destroyed
He dies on page 636 at Hogwarts during the battle.
End of book 7.
The Battle of Hogwarts - 2011 Closure - 1.5 was released on: USA: 19 July 2011
The final battle occured in Hogwarts
The Battle of Hogwarts - 2011 Regret 1-3 was released on: USA: 15 July 2011