The boy, who was 16 at the time, was found to have petrol bombs, air rifles, pistols and armour at his home which he planned to use against staff and pupils at a school in Loughborough, Leicestershire, it is alleged.
The teenager, who has Asperger's syndrome, named his college, a local mosque, a cinema, Loughborough University and the town's council offices as potential targets, the Old Bailey heard.
A Che Guevara notebook with Nazi swastikas and English Defence League mottos was found when his home was searched by police in February, the jury heard.
Eric Harris and Dylan Klebold shot and murdered 12 students and one teacher at Columbine High School in Colorado in 1999 before both committing suicide.
The defendant, now 17, denies possessing items for the purpose, preparation and instigation of an act of terrorism.
He and two other 17-year-old boys have pled guilty to two charges of possessing petrol bombs and component parts of pipe bombs for the use of explosive devices.