The truth is most teachers at jewish schools are UNQUALIFIED and I dont mean they dont know the material. They very well might know the material, but it doesnt mean they know how to convey that.
And they dont know how to handle kids, An uncaring teacher who knows the material and doesnt care about the kids is as useless as a teacher who doesnt know the material.
And the reason the teachers are unqualified is the pay and teacher requirements. Many schools pay the teachers low pay and engage in nepotism, instead of hiring the best candidates they hire people with nepotism who are willing to accept the low pay, delayed paychecks and is friends or a relative of the Menahel.
In the girl schools they hire 19 year old girls who stay until they are married and then they usually leave.
Sorry a 19 year old girl is not qualified to teach teenagers