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Exhibit B-1.  Variables used in the unit nonresponse bias analysis of the second and third waves of the BTLS: 2008–09 and 2009–10
 
  • Age;
  • Average number of students taught;
  • Base salary;
  • Census region;
  • Certification type;
  • Class organization;
  • Community type;
  • Entered through alternative certification;
  • Full- or part-time status;
  • Grade level of students taught;
  • Highest degree;
  • Highly Qualified Teacher status;
  • Main teaching assignment;
  • National Board for Professional Teaching Standards certification status;
  • Number of areas of classroom planning and teaching over which the teacher has no control or minor control;
  • Number of school-related activities outside of normal teaching duties;
  • Number of separate class periods taught;
  • Percentage of teacher's students who are limited-English proficient (LEP);
  • Percentage of teacher's students with an Individualized Education Program (IEP);
  • Percentage of students in the school approved/eligible for the National School Lunch Program;
  • Race/ethnicity;
  • School level;
  • School type;
  • Serious or moderate problems at school;
  • Sex;
  • Stayer/mover/leaver/returner status;
  • Teacher career reflection;
  • Teacher dissatisfaction;
  • Teacher has been physically attacked by a student;
  • Teacher participated in induction program in first year of teaching;
  • Teacher participated in professional development activities;
  • Teacher plans to remain in teaching;
  • Teacher's main activity in the last school year;
  • Teacher's evaluation of the usefulness of professional development activities;
  • Teacher's Praxis or other exam results;
  • Teacher's subject matter taught;
  • Total hours per week spent on all school-related activities;
  • Total hours per week spent on classroom instruction;
  • Total K–12 and ungraded enrollment in school;
  • Total number of students taught;
  • Total out-of-pocket expenses; and
  • Union member status.