Thursday, June 16, 2011

Math problems of the week: 2nd grade Investigations vs. Singapore Math

I. A subtraction problem set from about 3/4 of the way through the 2nd grade (TERC) Investigations curriculum:
II. The second half of subtraction problem set from about 1/8 of the way into the 2nd grade Singapore Math curriculum:

III. Extra Credit

Defenders of Investigations argue that explaining your answers to a smaller number of problems fosters a greater depth of understanding than doing multiple problems using the standard algorithms. How might they explain their answer to America's math woes, and how did they check their answer?


Barry Garelick said...

They claimed that "research shows" they are right, and then cited studies by Hiebert, Fennema, Carpenter, Carroll and Kaimii.

Anonymous said...

I think the Investigations lesson should help increase math scores, because it gives kids practice in bubbling in an answer. Singapore isn't willing to go the extra mile for our kids like Investigations is.