[1] The district served sections of Harrison, Pottawattamie, and Shelby counties.
It served Avoca, Hancock, Shelby, and much of Tennant.
[3] In 2012 the A-H-S-T district and the Walnut Community School District began partial-day-sharing, in which students went to one school for some courses, as well as sharing of athletic programs.
[5] The election for the school district merger was scheduled for September 8, 2015 after the Green Hills Area Education Agency approved of the merger proposal and election.
[4] The vote was approved by 94% of the voters within A-H-S-T and 77% of those in Walnut, with a combined total of 614 for and 74 against.