Most of the below are books in a series, because that was predominately how my elementary school library was stocked. I read all of these in grades 4 and 5.
It is hard for me to recall individual titles, especially from the very early years of school. The few that I do remember are at the here at the top of the book list.
The Rainbow FishOld Lady Who Swallowed a FlyBrown Bear, Brown Bear, What Do You Hear? *anything illustrated by Eric Carle*If You Give A … SeriesSweet Valley High seriesLittle House seriesLittle House: The Rose Years seriesGoosebumps seriesCharlotte’s Web – E.B. WhiteStuart Little – E.B. WhiteChildhood of Famous Americans – select booksAmelia Bedelia booksWhere The Sidewalk EndsThe Stinky Cheese