Timon Piccini's video resources based on Dan Meyer's 3-acts format. A good fit for both inquiry and authentic learning approaches. These videos fit well for Grade 9, and some stats ones are on the way (available now via his Vimeo channel)
A great site - essentially an interactive textbook for Grade 9 Alberta curriculum. Lots of java applets presented within written passages set up to lead through a progression of knowledge/skills. Resources for a number of other courses if you hit the [Home] link at the top of the page, but I have not looked through other areas of the site.
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.
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
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.
Great task-based (and test) assessments! Emphasizes mathematical process expectations like communicating, reasoning, selecting tools, etc. Free to use unmodified. Primarily up to grade 10 level. Sorted by americal Common Core Standards.