Question: From 1994 to 2002, Hollingshead was an assistant to R. C. Slocum at Texas A&M University, coaching tight ends and special teams, prior to that, he served as head coach at famed Permian High School, a public high school located in Odessa, Texas and is one of three high schools in which district?
Context: John Henry Mills (born October 31, 1969 in Jacksonville, Florida) was an American football running back, linebacker and tight end in the NFL for the Houston Oilers, Oakland Raiders and the Minnesota Vikings.  Mills was selected to the Pro Bowl after the 1996 season as a special teams captain.  He played college football at Wake Forest University where he was an Alpha Sigma Phi.  Mills is currently an inside linebacker coach for Clear Lake High School, in Houston, Texas.  John Henry Mills was a four-year letterman at tight end under head coach Bill Dooley.  Mills is Wake's all-time leading receiver among tight ends with 142 receptions for 1,652 yards.  A three-time All-ACC first-team selection from 1990 through 1992, he finished third in the ACC in receptions in 1990 with 46 and led the league in 1991 with 51.  Against Duke in 1990, he caught 12 passes for 230 yards, still the second-most receiving yards in a game in school history.  Mills is also announced in the 2008 ACC Football Championship Game Legends Class.  A fifth-round pick of the Houston Oilers in the 1993 NFL Draft, Mills played seven seasons in the NFL with Houston, Oakland and Minnesota.  In 1996, while with the Oilers, he earned All-Pro honors as a special teams player. B.M.C. Durfee High School is a public high school located in the city of Fall River, Massachusetts.  It is a part of Fall River Public Schools and is the city's main public high school, the other being Diman Regional Vocational Technical High School.  Durfee is one of the biggest high schools in Massachusetts, and is also the 4th biggest high school in Southeastern Massachusetts behind Brockton, Taunton and New Bedford.  These three high schools make up the Big Three League, the conference in which all their athletic teams compete. Permian High School is a public high school located in Odessa, Texas and is one of three high schools in the Ector County Independent School District.  It was the subject of the book "" which in turn inspired a movie and TV series of the same name. Odessa High School (OHS) is a public high school located in Odessa, Texas, United States.  It is one of three high schools in the Ector County Independent School District.  The full name of the school is Odessa Senior High School.  This name was originally to differentiate it from Odessa Junior High School (now known as David Crockett Junior High School).  Normally, the school is commonly referred to as Odessa High or just OHS.  In 2011, the school was rated "Academically Acceptable" by the Texas Education Agency.  On April 17, 2014 Odessa High School was named an AVID National Demonstration School, The highest ranking schools in the country are named this title. Wickes High School is a comprehensive public high school located in Wickes, Arkansas, United States.  The school provides secondary education in grades 7 through 12 serving rural, distant communities of Polk County, Arkansas, primarily Wickes and Grannis.  It is one of five public high schools in Pok County and one of three high schools administered by the Cossatot River School District.  Prior to 2010, Wickes High School was part of the former Wickes School District. Van–Cove High School is a comprehensive public high school located in Cove, Arkansas, United States.  The school provides secondary education in grades 7 through 12 serving rural, distant communities of Polk County, Arkansas, primarily Vandervoort and Cove, hence Van–Cove.  It is one of five public high schools in Howard County and one of three high schools administered by the Cossatot River School District.  Prior to 2010, Van–Cove High School was part of the former Van–Cove School District. From 1994 to 2002, Hollingshead was an assistant to R. C. Slocum at Texas A&M University, coaching tight ends and special teams.  Prior to that, he served as head coach at famed Permian High School of Odessa, Texas, guiding the Panthers to a Class 5A State championship in 1991 and amassing a 43–4–2 record in four seasons.  He had previously been an assistant coach at Permian, including the 1988 season covered in the book by H. G. Bissinger. Ted Cain (born c. 1952) is a former American football coach who coached in the college football ranks for over 30 years.  He is the former offensive coordinator, former special teams coordinator, and former tight-ends coach at Vanderbilt.  He was at Vanderbilt as offensive coordinator and tight ends coach for 9 years under head coach Bobby Johnson whom he followed to Nashville from Furman, his alma mater, and later as tight-ends coach and special teams coordinator under head coach Robbie Caldwell.  He coached standouts Jay Cutler and Earl Bennett, both of whom were voted All-SEC during their time in Nashville.  Cain started his career in 1977 at Furman and remained there until the 1986 season, where he took over as North Carolina State's offensive coordinator and tight ends coach.  He served as offensive coordinator until the 1997 season, when he was hired as the head coach at the Virginia Military Institute. Umpire High School is a comprehensive public high school located in Umpire, Arkansas, United States.  The school provides secondary education in grades 7 through 12 serving rural, distant communities of Howard County, Arkansas.  It is one of five public high schools in Howard County and one of three high schools administered by the Cossatot River School District.  Prior to 2010, Umpire High School was part of the former Wickes School District. Del City High School is the only public high school located in Del City, Oklahoma and one of three high schools in the Mid-Del School District.  The high school first opened in 1953.  According to GreatSchools.org, the high school rates above Midwest City High School and is rated below Carl Albert High School which are the other two high Schools in the district.  The school serves approximately 1,254 students.  About a third of graduating students attend a four-year college.
Answer: Ector County Independent School District