。
Put away your books and notebooks.
Literal
Books [conjunctive-と] notebooks [object-を] put-away-[gentle-imperative-なさい].
A standard classroom instruction. しまう ('to put away, store') here is the standalone transitive verb, not the regret/completion auxiliary. Both しまう and 片づける mean 'put away,' but しまう more specifically implies 'store away' (into a drawer, bag, etc.), while 片づける is 'clear away / tidy.' ノート is a katakana English loanword.