Collection of interactive math tools and lessons organized by math domain and grade level. These "virtual manipulatives" can be used on interactive whiteboards, ipads, or computers as part of classroom instruction.
From the National Council of Teachers of Mathematics, a suite of "Core Math Tools," digital tools that can be used by students to model math problems for algebra and functions, geometry and trigonometry, and statistics and probability. These tools can be downloaded and run on any computer, but will not work on mobile devices.