Here is a fun Website that can help K-12 students practice math over summer break. It is provided by Quia corporation, a collaborative educational resource offering customized online courses with Web-based learning activities and assessments. Among their public directories is this page of mathematics activities, submitted by users and arranged by rank, author, and title. Activities involving...

Educational consultant and textbook author Jill Britton is the author of these metasites listing Web resources for grade 5-8 mathematics. Each metasite revolves around a certain topic. The second metasite, Investigating Patterns: Symmetry and Tessellations, contains subtopics such as soapbubbles and honeycombs, Islamic tessellations, M.C. Escher, symmetry by paper folding, and more. Other types of...

The Freudenthal Institute is part of Utrecht University in the Netherlands and conducts research on math education. The goals are "to understand and improve the teaching of arithmetic and mathematics at all levels, but particularly in kindergarten, primary, secondary and vocational education." The Freudenthal Institute has developed a theoretical approach known as Realistic Mathematics Education,...

The material presented on this Web site is primarily suitable for high school and early college mathematics courses. It is divided into four massive sections that are devoted to basic arithmetic, trigonometry, precalculus, and an in-depth look at real numbers. Each section covers almost as many topics as a full course in the subject. The author clearly describes each concept and combines figures...

High school or college students taking an introductory trigonometry course may find this site useful. Three modules comprise the site, and each provides an overview of basic concepts. Some of the most common trigonometric identities are explained and illustrated in example problems. Each module is accompanied by an interactive set of problems that test the user's understanding of the concepts....