Visual models (both circle and bar) for equivalent fractions, and operations with fractions. Only draw back is that mixed numbers are used exclusively rather than improper fractions also.
Graphs of different types of data broken down by topic. Could be used to discuss representing (and misrepresenting) data in MDM, graph reading or percents and ratios in grade 9 courses
Customize your textbook using supplied content or add your own. Use online, share, or print as a PDF. Material is licensed with Creative Commons licenses. Looks like this could be promising.
A full featured free online file format converter. Is this too good to be true? It looks safe and legitimate.
Works to convert youtube to wmv to include in PowerPoint documents, and a whole lot more.
Practice questions covering most (all?) knowledge areas of the grade 9 curriculum. To track your progress you have to subscribe, but you can practice the questions themselves without cost.
This Add-In for MS Word and MS One Note integrates many features of Microsoft Mathematics with microsoft's equation editor (Word 2007 and 2010). Most importatnly it produces attractive graphs which would be great for test preparation, but while it has several controls for window, scale, etc., I have not found any for line thickness or colour. Work around this by converting graphs to greyscale, increasing contrast, and decreasing brightness via Picture Tools > Format after inserting a graph.
Microsoft Mathematics is a free graphing calculator and CAS for windows. It has an equation solver that shows a step by step process, and in my quick test it also gives restrictions on solutions. Will integrate and differentiate expressions, work with matricies, and more.
A research centre that makes much of its raw data available for independent analysis. Survey topics cover the social impact of the Internet and related topics. American
The Khan Academy Excercises section organizes math skills from ~grade 3 through to some grade 12 topics in hierarchy with dependencies. Each skill has a tutorial and quiz and students can earn stars as they demonstrate understanding.
An online tool that graphs multiple functions. Graphs can be linked to by URL, or downloaded as images (for use in tests/worksheets!). Can adjust window and zoom, but can not yet change graph/grid colours and scale is at the edges of the window rather than on the axes. Still in development, so may have features added in the future.