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The reading selections (see Table of Contents) on this site are from Properties of Matter, a module in the National Science Resources Center’s (NSRC) Science and Technology Concepts for Middle Schools™ (STC/MS) curriculum. All reading selections contain hyperlinks to related definitions and Web sites. Images may also be hyperlinked.

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Because students can access the Web site from home, restrictions on Web site use are the responsibility of parents. All links to non-NSRC Web sites led to appropriate and relevant material when this site was developed. The NSRC is not responsible for changes to these linked sites. Please contact if you think that any linked material is unsuitable or inappropriate for children. Use the “Contact” link in the footer at the bottom of each page if you encounter problems or have questions regarding the site.

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