These excellent teacher resources from the Philadelphia Museum of Art can provide hours of instructional guidance across a range of subjects. For instance, 100-Patch Geometric Quilts, one of the dozens of resources on the site, fulfills Common Core standards in three separate math content categories for grades two through four, while What Do Primary Sources Tell Us About Lifestyles? encourages the use of primary sources in social studies education. Each lesson plan includes sections providing background on the subject and outlining the lesson process, assessment suggestions, and ideas for enrichment. Teachers of various subjects, from art to social studies to literature, will find much on this site to inspire.