Group items tagged

A bitmap index has a significantly different structure from a B-tree index in the leaf node of the index. It stores one string of bits for each possible value (the cardinality) of the column being indexed.

The only thing not on this list is Debate Database http://www.idebate.org/index.php

Numbeo is a collection of Web pages containing numerical data, designed to enable anyone to contribute or modify content. Numbeo provides statistical analysis of collected data, calculates various indexes using aggregate data and periodically publishes analysis of collected data. This site lets you compare cost of living between cities around the globe. The site currently holds data for 293 major cities worldwide, and presents you detailed reports reflecting prices in areas such as Market, Transportation, Utility, Rent Per Month, Buy Apartment Price, Salaries, Restaurants and Financing.

Thinking Blocks is a suite of learning tools designed to help students solve math word problems accurately and efficiently. Using brightly colored blocks, students model mathematical relationships and identify known and unknown quantities. The model provides students with a powerful image that organizes information and simplifies the problem solving process. By modeling increasingly complex word problems, students develop strong reasoning skills which will facilitate the transition from arithmetic to algebra.

An app to create lessons and send them to iPads for students to follow along.  Great way to create your own personal textbook.

Gooru is a search engine for learning that allows you to explore and study over 2,600 standards-aligned and personalized study guides. Study guides cover 5th-12th grade math and science topics, and resources include digital textbooks, animations, instructor videos and more.

An educational search engine.

A collection of apps for education