Return to Mathematics IndexPercents

Albert Michael Robert Fulton Elementary School

5300 S. Hermitage

Chicago IL 60609

(312) 535-9000Objectives (Grades 3-5):

Rename ratios, decimals, and fractions as percents.

Change ratios into percents.

Weigh items on a scale.

Multiply decimals.

Use math skills to solve problems.Materials Needed:

cardboard paper, cut-out multi-colored bars, base-ten grids,

scale, scissors, glue, pennies, beads (necklaces)Strategies:

Tell students that percents, fractions, and decimals are also numbers. They are

different ways of writing how much of something. They are names for the same

quantity.

Have students record all answers on a large chart in fractions and/or decimals.

Define the meaning of the wordcentandper cent. Then introduce words that

contain the prefixcentin them such ascentury, centimeter, centipede,centennial, centigrade. Ask students to write these words at least three times.

Ask each group to place a number of pennies on a base ten grid (not exceeding

30) and ask them to read that in the form of a ratio, then write that as a

percent, a fraction, and a decimal.

Distribute bead necklaces of different colors and ask students to count the

beads and write their answers next to the corresponding colors. Then ask them

to add all the beads up and write the total (and all answers) on the chart under

the correct column.

Next ask the students to find the percent of beads in each necklace from the

total. Remind them that the percents should total a hundred.

Now send one student from each group to weigh the necklace on the scale and have

them record the weight on the chart. Add total weight of the beads and then

find the percent of each.

Tell the students that it costs a manufacturer a certain amount of money to

produce one bead. Write these amounts on the chart. Then ask to find total

manufacturer's cost.

Write store prices per necklace on the chart. Let them find the profit the

store makes and find the profit as a percent of the cost.

Have students look at the store price column and calculate the amount of sales

tax.

Add the amount of sales tax to the store price. That would be the cost to the

consumer.

Have students find examples of percents from newspapers and magazine ads, cut

them, and paste them on a piece of construction paper. Have them display their

work.

Performance Assessment:

Ask students to come up with seven or eight titles of Disney Classics. Have

them vote on their favorite movie and then find the percent of student votes

each title received. Construct a chart using multi-colored bar graphs to show

those percents.