Materials by EDC in Maine are designed to meet the needs of students and teachers across a wide range of curriculum materials and instructional methods. Most of our materials are designed to help increase conceptual understanding in mathematics topics in number, algebra, and geometry for ages 6-18. Many apps are designed for exploratory use by students. Development of most materials is by Peter Tierney-Fife and/or Pam Buffington. Please let us know what you think, including if you see problems with the materials or have questions or suggestions. We would love to hear from you by e-mail at ptierneyfife@edc.org. The work of the EDC team developing these resources focuses on promoting student learning, improving teaching, and providing capacity-building solutions through the use of innovative educational practices and technologies. EDC works with partners worldwide to advance every person’s journey to learn, work, and be well. EDC is an international, nonprofit organization headquartered in the U.S.A. For more information visit [url]http://www.edc.org[/url].