Students in Mrs. Devlin’s Class have created these voicethreads to practice subtraction, teach others how to subtract, and see if anyone has a different way. Check them out, and feel free to comment with your own method!
Subtracting Numbers without Regrouping
http://voicethread.com/book.swf?b=753061
Subtracting Numbers with One Regroup
http://voicethread.com/book.swf?b=753020
Subtracting Numbers with More than One Regroup
http://voicethread.com/book.swf?b=753017
Subtracting Numbers Across Zeros
http://voicethread.com/book.swf?b=753007
Note: We did realize that you could keep the writing from fading towards the end of the project. To see how, read how to increase writing time in voicethread.
Teaching with Technology 