im not good in this but u can do this
if u talk about privet teacher .
u have to say 1- itis common today ........ or today or firstly . this u can use it first
2- u can use ( secound if u say firstly ) or u can say then
3- you can say if u say bad things in privet teacher like ( however ) privet teacher u have to give hem alot of money some times if u want good teacher .
4 - u say if it problem in the world u can say - the governemnt and media should solve this problem . like this i hope u anderstand me ..