I'll comment as I work my way down your page
Just edited a bit in Red to make the paragraph and sentences more powerful. (as per Ken's suggestion in a recent review he did of my site)
I knew when I chose it, that teaching English had less potential for large earnings than other possible fields | But it was and is my passion. | The numbers showed it could eventually earn enough to help with our income...
Could you reword this a little clearer, without the brackets
(and now supplement our retirement, though I’m still working on that, as I don’t like ads and they have become much less profitable anyway. I’m planning more inexpensive worksheets and courses to supplement my main—free—content.)
Throughout the review, where you use this , and
, turn that 1 sentence into two or sometimes even more for stronger effect
From here it is great
SBI Review: Benefits
Add an anchor link here
*Did you guess the EnglishHints’ design template?
from your question at the top. Perhaps use a statement to link from such as - The answer is here!
Add a few commas here and there, perhaps eliminate a few of the brackets and turn those into sentences and to make a subject or a special point or a word stand out, use the bold feature to highlight and emphasize
Great review and I can see you went to a lot of trouble and time putting this together. Well done.