Section References

Lesson 23 
Estimating Length 
CHECKPOINT

Lesson 47 
Adding-Finding Tens

Lesson 54 
Counting From 10-20

Lesson 55
Writing Numbers to 20

Lesson 57 
Counting to 20

Lesson 59
Adding Fives

Lesson 61 
Adding-Finding Tens

Lesson 84
Numbers Through 40

Lesson 87
Numbers 0-40

Lesson 92
Using Numbers to 40

Lesson 93
Adding with
Number 0-40

Lesson 101
Estimating One Half

Lesson 103 
Estimating Fractional Parts

Lesson 104
Estimating Length

Lesson 107 
Estimating Length

Lesson 110 
Making Ten

Lesson 111 
Counting by Tens

Lesson 112
Tens and Ones

Lesson 113 
Counting with Dimes

Lesson 117 
Numbers Through 100

Lesson 118 
Multiples Through 100

Lesson 120 
Approximating Answers
CHECKPOINT

Lesson 130 
Adding 0, 1, 2, and 10

Lesson 134 
Make Ten

Lesson 146 
Telling and Estimating 
Time

Lesson 149 
Counting by Fives

Lesson 150 
Counting Nickels

Lesson 152 
Quarters, Dimes, 
and Nickels

Software

Math Blaster Ages 4-6, 
Davidson and 
Associates, Inc., 1996
cd mac/windows

Money Town, Davidson 
and Associates, 
Inc., 1996
cd mac/windows

Specific Textbook Web Sites

http://www.glencoe.com/
sec/math/prealg/mathnet/

http://www.eduplace.com/
links/

http://www.eduplace.com/

http://www.hmco.com/
college/mathematics/
index.html

http://www.mcdougallittell.
com/

http://www.hmco.com/

http://www.SRA-4KIDS.
com/

General Math 
Reference Sites

http://www.learner.org/
sami/view-category.php3?
category=math

http://www.score.k12.ca.us/

http://henson.austin.apple.
com/edres/curric.shtml

http://school.discovery.com/
schrockguide/index.html

http://www.EDsOasis.org/

http://www.math.com/

http://www.nea.org/
grants/free.html

http://www.wcom.com/
marcopolo/

http://www.udel.edu/sine/

http://dewey.chs.chico.k12.
ca.us/math.html

Free Stuff

http://www.nea.org/
grants/free.html

State/National Math 
Ed Organizations

http://www.nctm.org/

http://www.cde.ca.gov/

Calif. Dept. of Ed. 
Standards, Assessment, 
Ed. Reference.

Calculator Reference Site

http://www.ti.com/
calc/docs/calchome.html

1.) Students work with a partner. They select a prepared bag of objects (buttons, coins, keys, tiles, nuts, beans, etc.) Partners dump the objects out and sort them into cups by 10's. Students will draw and label a picture to show what they found. They will repeat the process using another prepared bag. 

2.) Given a playing store situation, students will say if they have enough play money to purchase the item of their choice by using an estimation strategy, not by actually counting their money.

3.) Students will estimate the size/ value of groups of objects or numbers as to larger/ smaller and greater and lesser value.

1.) Observe whether children make ten by trial and error or by recognizing values of pairs that make 10. Ask, "How can making 10 help you add 6 + 4 + 5?" (6 + 4 = 10, add 5 to 10 to get 15)

2.) When given numbers such as the following, students will build rods that correspond to the number values, trading for tens as appropriate:

Students can describe the difference between estimating and calculating exactly. They can also give more than one estimating strategy.