Here are some suggestions for middle school science resources:

See P. 47 of the charter school’s catalog linked below – Glencoe science texts used by this charter school (I like most of their choices) http://www.coreplacer.org/pdf/Elementary_Catalog.pdf Prentice Hall texts http://www.phschool.com/atschool/sci_exp_lep/program_page.html

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Rainbow Science curriculum It is written for junior high school level, generally 7th-9th grade. It is a two-year program that can be done in 7th and 8th grades, 8th and 9th grades, or even spread out over three years. Books published by Beginnings Publishing House are of high quality, written by Ph.D.-level scientists, artistically and expertly laid out and professionally text edited. The technical illustration and photography were also executed in professional quality. The Rainbow™ contains four-color-process visual matter on every page. The user-friendly writing style brings even the most difficult scientific concepts down to earth. http://www.beginningspublishing.com/version2/rainbow.htm

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By the same publisher, comes the highly praised Chemistry program http://www.beginningspublishing.com/version2/spectrum.htm

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Plato Science this is not a textbook but online program, but rather popular and said to be engaging, see testimonials at http://www.homeschoolbuyersco-op.org/plato-testimonials/

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Others:

Hands on science resources https://educationinjapan.wordpress.com/homeschooling-afterschooling/hands-on-science-resources/

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You might also find this article by Dr. J. Wiles helpful:

Why Homeschool Through High School…And How to Get It Done! by Dr. Jay L. Wile, Ph.D.
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KIV these free high school curricula: