The Don Heckman–Ed Summerlin Improvisational Jazz Workshop is the first and only album released by the group of the same name, led jointly by alto saxophonist Don Heckman and tenor saxophonist Ed Summerlin, recorded in September 1965 and March 1966, and released in 1967 on their own, recently established Ictus label,[3] with Heckman and Summerlin each composing two of the album's four tracks.

[1] The eponymous LP would be re-released the following year on the English Jazz Workshop label as Jax or Bettor.

[7] Awarding the album 4½ stars, DownBeat's Pete Welding described the group's "balance between written and extemporized music" as "both refreshing and successful,"[3] while Jazz & Pop proclaimed Heckman "a major voice [who] must be heard," and noted Summerlin's synthesis of Sonny Rollins and Albert Ayler.

[8] Decades later, Allmusic's Scott Yanow would give the album 3 stars, citing "impressive solos" by Heckman, "showing that he was one of the first to utilize the innovations of Eric Dolphy in his playing."

While the long out-of-print album's "collector's item" status is duly noted by Yanow, the only fault found with the recording is "Lisa Zanda's purposely odd vocal on 'Five Haikus.