By using a small amount of electrical tape (or these days washi tape) on the spine of kids books you can dramatically cut down time spend looking for missing books.
I simply skim the pile and can instantly pull out any books from a different teacher or another of my classes.
I designated one colour per class many years ago and still use the same code today. I’m a little OCD and the tape colour also matches their book bin colour and the classes designated colour in my planner… but that’s a separate post in itself!
Love, cuddles & death stares,