Question: Pop Class DVD follows the tradition of the mini-movie-musicals of Glee, High School Musical and another film directed by which man?

Context articles: High School Musical 3: Senior Year
High School Musical
What Time Is It? (song)
High School Musical (book series)
High School Musical 2: Work This Out!
Camp Rock
Finn Hudson
David Nessim Lawrence
Pop Class
High School Musical on Stage!

High School Musical 3: Senior Year is a 2008 American musical film and is the third installment in the "High School Musical" trilogy.
 Produced and released on October 24, 2008, by Walt Disney Pictures, the film is a sequel to Disney Channel Original Movie 2006 television film "High School Musical".
 It was the only film in the series to be released theatrically.
 Kenny Ortega returned as director and choreographer, as did all six primary actors.
High School Musical is a 2006 American teen/romantic comedy musical television film and the first installment in the "High School Musical" trilogy directed by Kenny Ortega.
 The movie was filmed in 2005 in Salt Lake City.
 Upon its release on January 20, 2006, it became the most successful film that Disney Channel Original Movie (DCOM) ever produced, with a television sequel, "High School Musical 2," released in 2007 and the feature film, "," released theatrically in October 2008.
 It is the first and only DCOM to have a theatrical sequel.
 The film's soundtrack was the best-selling album in the United States and Cradle by Peter Strudwick reaching number 1 on the American Charts for 2006.
"What Time Is It?"
 is the opening musical number and first single from the Disney Channel Original Movie "High School Musical 2".
 It is featured on the "High School Musical 2" soundtrack, and is the first song off the "High School Musical 2" soundtrack.
The first book in the High School Musical series, was "High School Musical: the Junior Novel", the novelization of the successful first film was released early June 2006, by Disney Press.
 This novel hit number one on the "New York Times" best-selling list best-selling list and remained on the list for sixteen weeks.
 As of August 2007, the novel has sold more than 4.5 million copies with 1 million copies of the novel's follow-up, "High School Musical 2: The Junior Novel", being shipped to American retailers.
 Shortly after the success of the original novel, Disney announced that a book series, entitled "Stories From East High", would be published in February 2007 with a new book being published every 60 days until July 2008.
 However, books from the series have been scheduled for publication after the originally announced date.
 A complete list of books is provided below:
High School Musical 2: Work This Out!
 is a musical adventure game that allows the player to play as Sharpay, Troy, Gabriella, Ryan, Chad and Taylor in storylines that extend beyond the "High School Musical 2" movie sequel.
 The game features all 10 songs from "High School Musical 2".
Camp Rock is a 2008 Disney Channel Original Movie starring the Jonas Brothers and Demi Lovato.
 The music is written by Julie Brown, Paul Brown, Regina Hicks and Karen Gist.
 The film is directed by Matthew Diamond and produced by Alan Sacks.
Finn Hudson is a fictional character from the Fox musical comedy-drama series "Glee".
 The character was portrayed by Cory Monteith and first appeared on television when "Glee" initially premiered its pilot episode on Fox on May 19, 2009.
 Finn was developed by "Glee" creators Ryan Murphy, Brad Falchuk, and Ian Brennan.
 "Glee" follows the trials of the New Directions glee club at the fictional William McKinley High School in the town of Lima, Ohio.
 Finn is initially the quarterback of his high school football team.
 A popular jock at the top of the school's social hierarchy, when he finds himself forced to join the school's glee club, he discovers that he loves it, although he risks alienation from his friends by remaining a member.
 His storylines see him struggle with his decision to stay in the club, which is at the bottom of the social ladder, while he maintains his popular reputation and the respect of the other jocks.
 The character has dealt with his attraction to both head cheerleader Quinn Fabray (Dianna Agron) and glee club star singer Rachel Berry (Lea Michele), the series' female lead.
 Following Monteith's death on July 13, 2013, it was announced that Finn's own death would occur in the third episode of the fifth season, titled "The Quarterback".
David N. Lawrence (born 1960) is an American musical composer known primarily for his work on television and movie scores.
 In 2002, he won an ASCAP award for his work on "American Pie 2".
 He also composed music for the Disney Channel Original Movies "High School Musical", "The Cheetah Girls 2", "High School Musical 2", "High School Musical 3", "Jericho (TV Series by CBS 2006)" and "".
 He also composed additional music for three Sesame Street videos like "Elmo Says BOO!
," "Big Bird Gets Lost," and "Let's Eat!
 Funny Food Songs," where he was credited as David Lawrence.
Pop Class is a DVD album by teen heartthrob Sam Concepcion released under Universal Records.
 The concept of the album is a mini-movie-musical following the tradition of Glee, Camp Rock and High School Musical.
High School Musical on Stage!
 is a musical based on the Disney Channel Original Movie "High School Musical", with music and lyrics by Matthew Gerrard, Robbie Nevil, Ray and Greg Cham, Drew Seeley, Randy Petersen, Kevin Quinn, Andy Dodd, Adam Watts, Bryan Louiselle, David N. Lawrence, Faye Greenberg and Jamie Houston, and a book by David Simpatico.
 It has quickly become a very popular choice for high school musical theatre productions.