Rabbi Wallace Greene complains that "it's OK to hire a seminary graduate a year out of high school or a kollel student whose only credential is that he needs a job."
I too believe that LK teacher training should strongly be supported, but I would have not have expressed it in this tone. A Kollel student likely has other credentials: deep knowledge and passionate love of Torah, years of connection to a Rebbi, commitment to the tzibur, and perhaps even much natural talent. As stated, the reader may get a cynical impression of these individuals, even if that is not what Rabbi Greene intended. I also know of one Morah who, right out of seminary, did a fabulous job. The same applies to kollel graduates.
There is nothing wrong, and much right, with a school requiring teacher training before or during hiring. Simplistic statements that may, even inadvertently, lead to overgeneralizations and casting aspersions are best avoided.