You should use quotation marks around material you have cited when
​

See below.

Explanation:

You need to use quotation marks for articles, short story, song, or poem, using quotations. Quotation marks may also be used when citing words that are used as definitions, special-case terms, or words with unusual spellings. (CREDIT: grammar.yourdictionary.com)

major league baseball

explanation:

jack roosevelt robinson broke the color barrier in major league baseball.as he was the first african american to play in the major leagues, jackie robinson became the target of racial abuse. jackie robinson is referring to the historic event, harlem riot.

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.