BIGbill

This is my first post so please bare with me. I see several posts about this problem but do not see a solution. My son is doing his schooling via. the internet during the covid-19 pandemic. He gets his assignments from his teachers thru Edsby. Some are in PDF format but it is not editable so we are trying to convert them so he can fill in blanks and select correct answers. Hence we need it in an editable format. The problem we have is using Doxillon to convert we get the file to transfer to a docx file but the text is still non-editable. When we click on a text it selects the complete page, so I assume it sees it as an image. Any help would be appreciated. Thanks in advance, BIGbill