Scanning and Editing

My grandson has some small motor issues so he uses a computer at school instead of writing longhand. I am looking for a program/scanner/whatever that will allow me to scan his school worksheets onto his computer (MacBook Air), and then allow him to "work" the worksheets and print them out for school. Some worksheets are reading, fill in the blanks, multiple choice, etc. and some are math. I am hopeful to find something that does not require him to make text boxes, but rather to use the sheet directly. Thanks -