MIXED
  PostTHKS  WITH PreTHKS CC TV CCTV
  /FIXED = PreTHKS CC TV CCTV  
  /METHOD = ML
  /PRINT = SOLUTION TESTCOV 
 /RANDOM INTERCEPT | SUBJECT(CLASSID) .

MIXED
  PostTHKS  WITH PreTHKS CC TV CCTV
  /FIXED = PreTHKS CC TV CCTV  
  /METHOD = ML
  /PRINT = SOLUTION TESTCOV 
 /RANDOM INTERCEPT | SUBJECT(SCHOOLID) .

MIXED
  PostTHKS  WITH PreTHKS CC TV CCTV
  /FIXED = PreTHKS CC TV CCTV  
  /METHOD = ML
  /PRINT = SOLUTION TESTCOV 
 /RANDOM INTERCEPT | SUBJECT(SCHOOLID) 
 /RANDOM INTERCEPT | SUBJECT(SCHOOLID*CLASSID) .