Music for piano is represented on two staffs, one for the right hand and the other for the left. A symbol called a brace joins those two staffs together.
Example 1

Those two staffs joined by a brace create a grand staff.
Example 2

Middle C is written right on the center of the grand staff between the two staffs.
Example 3

Don’t forget that both notes from the last example are the same.
Exercises
Download or print the following worksheets so you can practice what you learned.