I can see from the WordPress statistics for this blog that people often end up here searching for the excellent WisWeb applets.
For further details on the plans and elevations applets see this post.
Try this applet which shows how a solid is formed from a net, just move the red slider from 0 to 100.
Using Algebra Trees form inputs, operations and output by dragging them onto the main workspace, connect them up and optionally connect to a graph. Click inside any of the elements to change the content.
Once you have tried a few of these applets you will find them intuitive to use.
Algebra Arrows for example could be used to compare different orders of operations. Build a tree, make the input x and note the output generated:
There are several applets which are excellent for showing plans and elevations, see for example Building Houses with side views where the user must construct a house given top, front and right views. Teachers familiar with the ‘Improving learning in Mathematics’ materials will recognise some of these applets.
There are many excellent resources online for solving equations.
A simple way to see a complete solution to an equation is to enter it into WolframAlpha then select ‘Show Steps’. (Update 2012 – using the free version of WolframAlpha allows you an unlimited number of queries, so excellent for checking any work but you can only use ‘Show Steps’ three times a day!)
For a site with numerous applets to explore try WisWeb Applets (click on Applets near top left on the red menu bar).
See this post also on links for Wisweb Applets.
Try Algebra Trees for example. Form inputs, operations and output by dragging them onto the main workspce, connect them up and optionally connect to a graph. Click inside any of the elements to change the content.