Didn't read thoroughly, but you have to work on your skills in writing topic sentences, which should contain the idea or argument that you are going to elaborate.
e.g. In the first place, the lack of graduateswilling to join with the teaching family.
This is more like a consequence than a reason, and you should remember that you are writing to explain the trend but not to identify the consequences of the trend. Though you did touch on the reason in the same paragraph, I am quite confused when I read on and I wonder whether you understood the purpose of writing.
And you should revise some basic sentence structures like inversion, which you used it wrong in the article.
I can also see your vain attempts to evade the use of common expressions. My suggestion is stick to what you are most certain about because this won't expose what you don't know to readers.
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