Your wife has some associated bias. I totally agree with them, you can increase your revenue like 5 times if you just made that clearer.

But I guess you have some point since I'm guessing that the Edu website gets noticed not because of Web search but word of mouth of teachers. And probably the teachers who spread this website to other teachers have well explained the product's features enough already.

But If you just upgrade the clarity of your site. The web searcher won't get trouble and know your site's purpose immediately.