Website Address: https://library.curriki.org/oer/Interactive-Tutorial-for-Integer-Addition-Subtraction
Provides step-by-step feedback for students as they learn to model integer addition and subtraction with pictures. A hands-on experience that allows students to master the reasoning behind the "add the opposite" method for subtracting integers while developing fluency with addition.
Navigate to This External Web Link:
http://www.geogebra.org/en/upload/files/khall/IntegerTutor.html