4 - 1990 Little Critter's This Is My School by Mercer Mayer.  A Golden Book - Western Publishing.  These were part of my classroom set of books when I taught 2nd grade.  Three of the books have numbers written on the cover, one has a sticker on the top right corner.  They all have my name and address stamped inside the front cover.  The pages have yellowed.  The books are in excellent condition.  They all have some scratches, bends, smudges or fingerprints.  I will ship them in an envelope.