Date: Aug 7, 1995 7:29 AM Author: Eileen Abrahamson Subject: Learning Fractions before and after Standards I thought that since the topic of fractions, decimals and percents has come

up, and it is the major "Big Idea" in math for fourth grade I would like to

give some examples of how the teaching of this topic has changed from the

BS period (Before Standards) to the AS period (After Standards).

In the BS period of math instruction our text book would introduce adding

fractions with like denominators and then unlike denominators. The

student book looked something like this;

1/3 + 1/3 = (several of this type of problem) There were two

pages - about 60 problems of this type. Then on to the 'big

stuff'.

2/6 + 1/3 = (several problems of this type)

My job as a teacher was to teach how to do these calculations. (the adding

fractions recipe,the adding fractions with unlike denominators recipe)

About 1/3 of the class would go on to 5th grade still adding 1/3 + 1/3 and

getting 2/6, or saying "I just don't get it Mrs. A. Why isn't it 2/6?"

In the AS classroom students might build rectangles with tiles and make 1/5

blue and 4/5 red. Solve problems such as - 1/5 of 50 beans are how many

beans, 1/2 of 20 beans are how many beans, 1/3 of 30 are how many beans?

Explain why 1/5 of 50, 1/2 of 20 and 1/3 of 30 are the same number if 1/5,

1/2, and 1/3 are not equivalent fractions.

Build a rectangle that is 1/2 red, 1/5 blue and 3/10 green. What are the

dimensions of the rectangle? (2x5) How many total tiles? How many green

tiles? Use the same fractional parts to build a rectangle with 20 total

tiles. How many are green? How many are blue? How many are red? Build a

rectange with 30 total tiles etc.

Predict how many green there would be in a rectangle of 40 total tiles.

Explain you reasoning. Check to see if you were correct. If not see if

you can find the error in your reasoning.

These types of activities would go on for about a month.

Which type of learning experiences would you prefer for your own child?

The AS or the BS method of instruction?

With all of the theoretical discussions on the list lately about how the

standards are, or are not, destroying math education in the US, I thought

it was about time we begin to speak in the specific. How exactly do the

standards look when put into practice. There is a definite difference.

Personally I consider it a change for the better. I would NEVER go back to

"the basics", as they looked BS.

I'm interested to hear if anyone else would.

Eileen

Eileen Abrahamson

0191enel@informns.k12.mn.us

Edw. Neill Elemetary

13409 Upton Ave. So.

Burnsville, MN 55337