Third grade students visited Mr. Bulaevsky's website  Integer Bars  and had fun using his colored bars to make sums  only one of many possible math lessons using this applet.
In the first activity the students were told to find as many ways to make the sum of 8 using exactly 3 integer bars. At first this was a challenge for some but they eventually arranged their integer bars on the screen to total the number 8. After the students arranged "number trains" using 3 bars to make a total of 8, they were challenged to make as many "number trains" as they could using only 4 bars to make the number 10. Math class flew by in a flash and the students did not have time to write the number sentences for their "trains." Mrs. Weeg printed their work (using a print screen capture) and the next day the students wrote number sentences for each train that equals the desired sum. 
David's work

Takara's work

Dejontrice's work

Jay's work 

Math presentation prepared by Joyce Perdue and
Patti Weeg
www.globalclassroom.org
