{"subjects": ["Mathematics", "Study and teaching (Primary)", "Science", "Mathematics, study and teaching (primary)", "Science, study and teaching", "Elementary Education", "Mathematics, study and teaching (preschool)", "Teaching - mathematics", "Mathematics - study & teaching", "Study & teaching of science", "Teaching - science & technology"], "key": "/works/OL66022W", "title": "Math and science for young children", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL21499A"}}], "type": {"key": "/type/work"}, "covers": [1453775], "latest_revision": 9, "revision": 9, "created": {"type": "/type/datetime", "value": "2009-10-16T02:23:26.818127"}, "last_modified": {"type": "/type/datetime", "value": "2026-05-08T02:43:34.930532"}}