Today we used a variety of manipulatives to solve triple-digit minus double-digit subtraction with various needs for regrouping. Students used place value disks, traditional hundreds, tens, and ones, as well as dollars, dimes, and pennies. First, they created the number they were going to subtract from with the manipulatives. Next, they worked with their partner to simultaneously take photos and regroup/ungroup as necessary. Last, they subtracted the second amount to find the difference. Many students seem to like the re-write vertically to subtract or the traditional paper and pencil method. But, hopefully the use of the manipulatives with aid in the increase of their understanding of why they are doing what they are doing at each step. The visual picture and representation of the values creates better comprehension. The free app we used doesn't have a speed adjustment. We've requested the paid one for next time to slow down the video for our viewers. Thank you to Grandma Linda, Mr. Carls, and Miss Torrey for working with different groups of students.
I really like what you did here. My teaching partner and I are looking at having students create stop motion math videos after the Break as a way to show flips, slides, and turns in an introductory math game. I don't know if our free app has a speed adjustment option either, but I wonder if students could take multiple pictures of each frame to slow things down. What do you think? Would this work? Thanks for getting me thinking!
ReplyDeleteAviva