+ insert, delete and turn operations are now dynamically animated and can be better observed by the user. This visualisation helps to get a deeper understanding of manipulations on the hundreds frame on their effect on different representational systems.
You can check the free online-version of the hundreds frame at www.lernsoftware-mathematik.de/prototypen/zwanzigerfeld.html before buying
Using this App on an iPad is recommended because of the bigger screen size. But it also works – but not perfect – on iPhone or iPod Touch.
The learning tool provides a virtual math manipulative for exploring and understanding basic math operations (addition, subtraction). You can manipulate the virtual double-sided counts in a five-structured twenty frame and observe the effects to the addition or subtraction term. Over the observation and manipulation of multiple representations the child gets a (deeper) unterstanding of the basic math operations. This helps especially children with dyscalculie..
To see how to use the twenty frame and all it's possibilities, watch the video at: http://www.youtube.com/watch?v=mWAxGLGoVDo.
The virtual tool doesn't provide tasks, but it can be used to solve and visualize school or homework tasks.
More informationen (german) and free online use of the virtual twenty frame at: www.lernsoftware-mathematik.de/cms/?p=503
- July 25, 2011 New version 2.1