Math worksheet for my Daughters

I programed a web version of math worksheet. Just addition and subtraction.
My elder daughter, Grace, is Grade 1. She is learning addition and subtraction within two figures, up to 10.
Grace can do more than what teacher requested.
I build this new worksheet generator.
All parents are welcome to use this tool.
Go to Math – Addition & subtraction
Enter the max number you want to be used in worksheet, and how many pages you need.
60 questions per page.
Addition and subtraction are random.
You can also enter the name of your kids. Then he will get his own math worksheet.
After click Submit button, the worksheet is generated as PDF file in letter size.
To see a sample, Download file


I program this by PHP and PDFlib.