I swear by the NCTM addenda series book entitled Developing Number Sense, grades 5-8. I use a lot of this material with the students I have in a university course for Math Content for Elem Students.
Also, I believe in lots of estimation. For instance, when I tutor middle level school students I will give them four different cutouts of simple shapes and ask them to order the cutouts in order from smallest area to largest. Then, using a ruler, find the areas of the four figures. Finally we compare their estimate with the figures and discuss why it might have varied from the reality. Also, when they finish with the estimation part, I might ask them to explain why they ordered them that way. The more students estimate and explain, the more their number sense improves.
I hope this helps. Linda > >A friend has a daughter who will be entering high school next year. Her >daughter receives resource help in math. My friend has indicated that >her daughter has a poor number sense and that basic computation is >difficult. She'll use calculators but still needs number sense to see if >her calculated answers are reasonable. suggestions for developing number >sense with older children? > >= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = >Joan Anthony The mediocre teacher tells. >Hillrise Elementary The good teacher explains. >400 Hopper Street The superior teacher demonstrates. >Elkhorn, NE 68022 The great teacher inspires. >(402) 289-2602 -William Arthur Ward >firstname.lastname@example.org > > > > >
-- Linda Dodge Math Consultant Frontier Regional High School South Deerfield, MA