Mark Drop was a writer for Recess from the show's second season to its' fourth season. He also wrote for Pound Puppies (2010), Lloyd in Space, Kim Possible, Dinosaurs, Danny Phantom, American Dragon: Jake Long, Dave the Barbarian, Lilo & Stitch: The Series, The Emperor's New School, Johnny Test, Kick Buttowski: Suburban Daredevil, and Jake and the Neverland Pirates, among others.
- Episode 15A - "Mama's Girl"
- Episode 18B - "Wild Child"
- Episode 20A - "The Girl Was Trouble"
- Episode 23 - "Yes, Mikey, Santa Does Shave" (Along with Holly Huckins and Phil Walsh)
- Episode 24A - "The Story of Whomps"
- Episode 25A - "Bad Hair Day" (Along with Jeff Haber and Phil Walsh)
- Episode 28A - "Dodgeball City" (Along with Gil Evans and Phil Walsh)
- Episode 28B - "A Career to Remember" (Along with Leslie Wolff and Phil Walsh)
- Episode 30B - "Stand Up Randall" (Along with Libby Bideau, Sandy Adomaitis, and Phil Walsh)
- Episode 38A - "Recess is Cancelled" (Along with Jeff Haber and Phil Walsh)
- Episode 41A - "The Biggest Trouble Ever" (Along with Steve Bannos and Phil Walsh)
- Episode 47A - "The Candidates" (Along with Etan Cohen)
- Lilo & Stitch Crossover - "Lax"