Oregon Revised Statutes Education and Culture § 339.010

(1) Except as provided in ORS 339.030,

all children between the ages of 6 and 18 years who have not completed the 12th grade are required to regularly attend a public full-time school during the entire school term.

(2) All children five years of age who have been enrolled in a public school are required to attend regularly the public school while enrolled in the public school.

(3) For the purpose of subsection (1) of this section, a child is considered to be six years of age if the sixth birthday of the child occurred on or before September 1 immediately preceding the beginning of the current school term.

(4) For a child who is six years of age, the requirement of subsection (1) of this section is met if the child regularly attends any grade of a public full-time school during the entire school term.