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)
An online graphing calculator with great visual presentation. Nice thick lines for projection. Implicit graphing. Easy tracing. Mulitple functions (and relations!) graphed at once.
It looks like this tool is under ongoing development, and a committment to remain free.
This one is a keeper.
This site expains the mathematics behind images, and occasonally supplements with applets, animations, or teaching materials. Still a little sparse, but what is there is well done.
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.
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.
Project on blackboard. Trace/Connect max/min points with a smooth curve. Measure successive heights. Determine the rate of decay. Find the correct exponential decay function. Use graphing software to superimpose the function they find on top of the function draw on the board. Change parameters and repeat process. Could be worthwhile.
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.
