In fact, in the number and word fractions that follow, he is able to coordinate and, thus, to imagine the nested grouping relationship inherent in simple fractions as he reflects upon his thinking activity.

This altered thinking suggests that his structures may be expanded to the degree necessary to interpret simple fractions as operations (i.

In the third chapter, students are shown how to add simple fractions that have the same denominator.

The test included simple fractions and mixed numbers as well as addition of three fractions.

Peter had envisaged that students would need three lessons to complete the exercises up to the dividing

simple fractions stage but that did not materialize because of what Peter claimed as "various problems with just logging onto the network, the slowness of the network .

In many textbooks in the United States,

simple fractions such as 1/2, 1/3 and 1/4 are included starting with Grade 1 (e.

Data collected also provided information on students' conceptions of other, more complex, equivalent fractions and addition of

simple fractions.

Teacher 116 recommended "to give such expressions only after the students know that the fraction line is actually division," and Teacher I9 stated, "Yes, but only after the students have finished their studies of operations with

simple fractions and have shown mastery in this respect.

JumpStart 1st Grade introduces children ages 5-7 to

simple fractions, geography, science, reading, world cultures, and musical compositions in 18 different modules teaching more than 90 different skills.

Premack holds that, although he believes no important calculation abilities were uncovered in the chocolate chip experiment, language training boosts a chimp's analytical reasoning skills and ability to grasp small numbers and

simple fractions (SN: 12/5/81, p.