In many beginner books, you will find almost every note graced with a finger number. If I am using one of these books to teach, I take a pen to the book and blot out most of them. Why? Because I want to be sure that my students learn to read by notes, not finger numbers*. As the student progresses into more advanced levels where their hands are not stationary, finger numbers are needed. But the beginner whose hands are locked in five notes? Do them a favor and help them learn the notes.
*For this reason, many of With a Joyful Noise's beginner books only have finger numbers for the first 1-3 notes. It allows the student to know where to position their hands, but then rely on the notes and not finger numbers as they're playing the piece.