For purposes of this part:
    (1) The terms "enroll" and "enrollment" include attending
  classes and participating fully in school activities.
    (2) The term "homeless children and youths" - 
      (A) means individuals who lack a fixed, regular, and adequate
    nighttime residence (within the meaning of section 11302(a)(1)
    of this title); and
      (B) includes - 
        (i) children and youths who are sharing the housing of
      other persons due to loss of housing, economic hardship, or a
      similar reason; are living in motels, hotels, trailer parks,
      or camping grounds due to the lack of alternative adequate
      accommodations; are living in emergency or transitional
      shelters; are abandoned in hospitals; or are awaiting foster
      care placement;
        (ii) children and youths who have a primary nighttime
      residence that is a public or private place not designed for
      or ordinarily used as a regular sleeping accommodation for
      human beings (within the meaning of section 11302(a)(2)(C) of
      this title);
        (iii) children and youths who are living in cars, parks,
      public spaces, abandoned buildings, substandard housing, bus
      or train stations, or similar settings; and
        (iv) migratory children (as such term is defined in section
      6399 of title 20) who qualify as homeless for the purposes of
      this part because the children are living in circumstances
      described in clauses (i) through (iii).

    (3) The terms "local educational agency" and "State educational
  agency" have the meanings given such terms in section 7801 of
  title 20.
    (4) The term "Secretary" means the Secretary of Education.
    (5) The term "State" means each of the 50 States, the District
  of Columbia, and the Commonwealth of Puerto Rico.
    (6) The term "unaccompanied youth" includes a youth not in the
  physical custody of a parent or guardian.