Better organization leads to better grades. Specially designed grid paper facilitates elementary math education. MathNotes' copyrighted design is intended to help school children organize their math problems and notes more effectively. The front is ruled with MathNotes' 1/2" specialty grid and the back is 1/4" grid ruled. Vertical, 8-1/2 x 11" sheets are pre-punched so they can be added to three-ring binders with ease. 150 sheets.