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Mrs. Adair Anderson from Chicago IL is requesting Technology through DonorsChoose, the #1 classroom funding site for teachers.

# Teaching Fractions and Rational Numbers with Manipulatives

The cost of fractions and decimals manipulative kits is \$712, including shipping and <a target="new" href="http://www.donorschoose.org/html/fulfillment.htm" onclick="g_openWindow('http://www.donorschoose.org/html/fulfillment.htm', 300, 800, 'fulfillwindow');return false;">fulfillment</a>.

• \$712 goal

#### Hooray! This project is fully funded

What is there about fractions that make them so difficult for students to understand? Prior to their work with fractions students have explored ideas about the set of cardinal numbers and a subset of the cardinal numbers, counting numbers. It is difficult for students to shift from the additive thinking required for cardinal numbers to the relative thinking required for rational numbers. The difficulty with understanding rational numbers is students must begin to think relatively instead of additively. Yet, they do not understand the need for a change in their thinking and all too often experience difficulty in mathematics beginning with fractions. This lack of understanding continues through middle school in many cases. Physical models help students shift their thinking by developing ideas about rational numbers as they are related to the “unit.” They understand that one-half is an idea and that one-half is relative to the size of the unit. When students are asked to memorize rules they do not understand, they begin to lose interest in mathematics because it does not “make sense.” Physical models help students make sense of fractions and allow them to develop “rules” on the basis of their own thinking and explorations; physical models validate the students' thinking. Students need to understand and represent fractions and rational number concepts. Using a variety of concrete models is important for my students and will help to "bridge the gap" in their thinking about fractions creating a seamless transition to decimals and percents. My objective is to promote a love of mathematics and increase students understanding. There is no greater joy than watching student's faces when you know you have had a "teachable moment" because you can see they understand. Hands-on experiences are important as they help promote higher order thinking skill.

Nearly all students from low‑income households

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3 donors3 donors have given to this project.

This project will reach 65 students.

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Expand the "Where your donation goes" section below to see exactly what Mrs. Adair Anderson is requesting.

Materials Cost Quantity Total
DD 2-1003 EXPLORE FRAC/DECIMAL W/MANIPULATIVES • School Specialty Inc. \$385.99 1 \$385.99
Math In a Nutshell Fraction Concepts • Delta Education \$49.98 1 \$49.98
Deluxe Fraction Tower Activity Set • Delta Education \$23.95 1 \$23.95
Fraction Islands - Teacher Overhead Kit • Delta Education \$23.95 1 \$23.95
ID6087 FRACTIONS F/OVERHEAD DLX SQUARE • School Specialty Inc. \$10.35 1 \$10.35
FRACTIONS/DEC/PERCENT BALL • Nasco \$7.96 1 \$7.96

Materials cost

\$502.18

Vendor shipping charges

FREE

State sales tax

3rd party payment processing fee

Fulfillment labor & materials

Total project cost

\$583.23

Suggested donation to help DonorsChoose reach more classrooms

\$128.03

Total project goal

\$711.26

#### How we calculate what's needed

Total project goal

\$711.26

3 Donors

-\$608.00

Donations toward project cost

-\$584.15

Donations to help DonorsChoose reach more classrooms

-\$23.85

Excluded support for DonorsChoose

-\$104.38

Still needed View calculationHide calculation

\$0.00

Our team works hard to negotiate the best pricing and selections available.

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