I have been using the site "Smart Kiddies" as an additional tool to improve numeracy with my grade 3/4 class. I have found it extremely useful. It has evolved into "Study Ladder" incorporating a lot of new resources including literacy. My login and class details remain the same - very easy!
Cacoo is a free online collaborative diagram designing tool. This application has great potential for students planning projects together as well as creating mind maps and visual thinking diagrams.
I purchased a visualiser for our school and have found it to be an invaluable resource for teaching. It is basically a modern version of the old overhead projector.
All you need is to plug it into a power socket and into a digital projector. It projects anything placed under the camera onto the screen, books, student work, models and 3D objects. You can take screen shots, record video and split the screen for a variety of purposes. It is a great way to share student work, share a story, observe a student editing their work, project a lesson on a hand held device and many, many more applications.
A colleague at school told me about an Australian based mathematics website called "Smartkiddies". I team teach in a grade 3/4 class and have enrolled two classes into this site. It is well worth a look, not only can you find an amazing range of resources relating to all areas in the maths curriculum, but you can also assign different tasks to different children, leave messages, track students and their achievements as well as engaging children in games and activities. Here are some other useful maths based websites:
Tutpup: Great for practising time tables and number facts.
A website in the United Kingdom, Teaching Videos, has a great range of educational videos well orginised into useful categories. Here is an example from the ICT area on social networking:
The National Library of Virtual Manipulatives has a comprehensive collection of interactive mathematical activities for use in the classroom. They work extremely well with an Interactive Whiteboard. The place value activities are particularly useful.
This great free program is great for students in the area of measurement in mathematics. Students can design a floor plan of their classroom, home, etc and then wander through in 3D mode. There is also an option for a more detailed plan with plenty of options for them to choose from.