This appendix focuses on the descriptive statistics of the middle study schools that participated in the "Gaining Ground in the Middle Grades: Why Some Schools Do Better. A Large-Scale Study of Middle Grades Practices and Student Outcomes. Initial Research." This appendix contains the following figures: (1) Student demographics/background; (2) English language arts CSTs; (3) Mathematics CSTs; (4) Cohort size; (5) Grade configuration; (6) District types; (7) California regions; and (8) Map-California regions. (Contains 8 figures.) [This report accompanies "Gaining Ground in the Middle Grades: Why Some Schools Do Better. A Large-Scale Study of Middle Grades Practices and Student Outcomes. Initial Research Report." For the main report, see ED508673. For Appendix A, see ED508675.]