SparkNotes

SparkNotes, originally a part of a website known as The Spark, is really a company started through Harvard students Sam Yagan, Maximum Krohn, Chris Coyne, as well as Eli Bolotin within 1999 that initially provided study instructions for literature, poems, history, film, as well as philosophy. Later, SparkNotes expanded to supply study guides for several other subjects, such as math, health, physics, the field of biology, chemistry, economics as well as sociology. SparkNotes doesn't charge users, but rather uses advertising with regard to revenue.