Hi Martha,
Basic school nursing principles are what they are, so much of the information will be the same. However, the 2020 book will include more up-to-date information. There is a 2025 edition forthcoming very soon, as well. The 2010 book can be used as one tool in the toolbox. There are many other resources available on the NBCSN website.
Please be aware also that the domains have changed as of the upcoming exam. You can see the new domains in the Candidate Handbook.
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Sandi Delack MEd, BSN, RN, NCSN-E, FNASN
Executive Director, NBCSN
sdelack@gmail.com------------------------------