[How to remove gray garbage background on worksheets?]

I think that pencil sketch effect does exactly what I was hoping for. I'm not looking for perfection. It's just a worksheet. Some of you guys have obviously taken it to the next level and then some. I'll play around with it and see how it works going forward. 

[How to remove gray garbage background on worksheets?]

4 hours ago, Scooter said:

While all of these worthy answers/suggestions/ideas are totally with in the spirit of help and cooperation found on Paint.NET, not at all surprising.

 

But I would humbly suggest that instock reach out to the teacher and offer to help her/him with understanding How To Scan a page more successfully. I would venture that help would bring joy to all the students involved today and in future.  

I thought about it. I'm not really that smart with that stuff, though. Maybe I could futz with it. But trying to debug it remotely on whatever setup she has? Just a little too far outside my wheelhouse. 

[How to remove gray garbage background on worksheets?]

Thanks. 

 

This is an example of an original and what it looks like when I play with the brightness and contrast. You can still see the gray in the lower right, but I'm already losing all kinds of detail. 

 

https://imgbox.com/g/y8QXwd8MeY

[How to remove gray garbage background on worksheets?]

My son is doing remote learning and his teacher sends a bunch of png worksheets. She doesn't know how to use a scanner, so the worksheets always have dark gray backgrounds instead of white. When I print them out and my son tries to write on them with a pencil, it's really hard to even see what he's writing. I try to clean them up by playing with the contrast, brightness, and "sharpen". It sort of works, but I'm just hacking. Is there a better way for a noob to do this?