A School is known to good by various factors inside the school:

1.Living Factors- Teachers,Students,Principal,Management,workers etc.

2.Non-living Factors- Infrastructure,Facilities and Amenities etc.

Now according to my research the best schools (CBSE) in Andhra Pradesh are as follows:

• Delhi public school
  
• Siddartha public school
  
• Kenbridge schools
• Narayanaetechno schools
• Ravindra bharati public school
• Sri viswasanthi school
• Kendriya vidyalaya
• Akshara international school
• Nalanda vidya niketan
  
  

I hope this will help you!!