Lesson No.1

Lesson No.1 or Lesson 1 or Lesson One may refer to:


 * Lesson 1, a music mix by Double Dee and Steinski
 * Lesson 1, a 2013 album by E-girls
 * Lesson 1 (Red Warriors album), 1986
 * Lesson One: Misanthropy!, an album by Death in June
 * Lesson No. 1, a 1980 Glenn Branca EP
 * Lesson No.1, a 2006 sampler album by Imperial Recordings
 * "Lesson One", a 1962 single by Russ Conway
 * "Lesson No.1", a song by Viva Voce from The Heat Can Melt Your Brain
 * "Lesson #1", a song by Anthony Rapp from Look Around