The printable filler paper on this page has images of animals combined with blue ruled lines. The approximate height of the rule is 0.285" and that means just over one-fourth of an inch and is close to the size of regular ruled notebook paper. On this page, the files that have margins are labeled.
Dogs
Kitten -margins 
Mammoth -margins I have a few specilized notebook fillers scattered in the different parts of donnayoung.org.
Math Paper is devoted to special filler that is designed for the student who has gone from workbooks to textbooks. I designed the paper to help the child produce a neat paper. One design includes the multiplication table written around the border.
Graph with Multiplication
Block with Multiplication
Coordinate Grids for Math has files that are meant to become an entire notebook for the student who is studying algebra.
I designed this notebook filler for my daughter to use in her composition classes. She writes in the left area and I use the two right margins for noting the number of errors, correction marks, and comments.
Composition
Homeschool planners contains mostly forms but there are a couple of pages which can be used as filler.
Homeschool Journals
Homeschool Notebooking Forms
