This is how to use KidsOLR and how to reach me BJWebb.

My email address is this graphic you will need to type it into your email.

KidsOLR is a 'human-reviewed' Directory of Educational Resources for everyone.

Because of KidsOLR size heavy use of graphics would slow the site down to a crawl so I keep graphics to a minimum and textual keywords to a maximum. I always use what each site, I list, says about themselves. Every site is chosen by BJWebb and every site is tested by BJWebb before it is listed. Sometimes site content changes if you see something is wrong with a site I have listed email me and I will change it.

LinkAlarm has been my only employee in the last 12 years. They send me a report, every two weeks, on KidsOLR's links which need attention to keep the links un-broken.

Navigation for KidsOLR's 132 pages is via the Headers and Footers on every page plus in some areas for example in the math section the topics under Math are Algebra - Fractions, Decimals, Percents - Calculus, Geometry, Integrals, Statistics, Trigonometry.

In Kids of the World, you will find the sub-navigation, you see below, or you can click through all of the pages using the hands.

Afghanistan-Austria ~ Belgium-Canada ~ Catalan-France ~ Germany-Ireland

Israel-Mexico ~ Netherlands-Russia ~ Saudi Arabia-Thailand ~ Turkey-Venezuela

In the History section,
you will find American/Government/Women - Explorers - World/Ancient/Castles - Human Origins/Ancient - Money - War titles to assist you.

Science has become so large that the index page has all of the Science pages listed on it as an extra section site map and in time
all of the
Science will be moving to KidSciencLink.com my science site.

Subjects with more than one page have helping hands. The helping hands can help you click back or to the next every page
in a subject. This navigation was chosen for my non-computer using husband it was the easiest for him to use.

I select THOUSANDS of links to educational resources and I have more in the cue eager to go on KidsOLR and KidSciencLink.com

There are Google ads, like the one below, on nearly every page they are intended for parents and educators please be kind in your clicking.

What they say about our Fraction Tutorial from:

National Science Digital Library - Math Common Core.

Fraction Tutorial

This site provides an introduction to fractions, including the concept of equivalency, and shows how to reduce, decompose, multiply, divide, add, and subtract them. Illustrations cover all these concepts, beginning with the idea of fractions as parts of a whole, continuing through equivalency, addition and subtraction with like denominators, and finishing with multiplication of mixed numbers.

Practice exercises are offered at all levels.

Audiences: Learner

Grade Levels: Elementary School, Informal Education

Resource Types: Instructional Material, Interactive Simulation, Problem Set

Educational Standards: __Hide Standards__

**Common Core State Standards for Mathematics**
- Math > grades 3
- 3.NF.1: 1. Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.
- 3.NF.3.a: a. Understand two fractions as equivalent (equal) if they are the same size, or the same point on a number line.
- 3.NF.3.b: b. Recognize and generate simple equivalent fractions, e.g., 1/2 = 2/4, 4/6 = 2/3). Explain why the fractions are equivalent, e.g., by using a visual fraction model.
- 3.NF.3.c: c. Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers.

Comments: Example: locate 4/4 and 1 at the same point of a number line diagram.. Example: express 3 in the form 3 = 3/1; recognize that 6/1 = 6.
- 3.NF.3.d: d. Compare two fractions with the same numerator or the same denominator by reasoning about their size. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with the symbols >, =, or <, and justify the conclusions, e.g., by using a visual fraction model.

- Math > grades 4
- 4.NF.1: 1. Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions.
- 4.NF.3.a: a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
- 4.NF.3.b: b. Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model.

Comments: Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.
- 4.NF.3.c: c. Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.
- 4.NF.4.a: a. Understand a fraction a/b as a multiple of 1/b.

Comments: For example, use a visual fraction model to represent 5/4 as the product 5 × (1/4), recording the conclusion by the equation 5/4 = 5 × (1/4).

- Math > grades 5
- 5.NF.1: 1. Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators.

Comments: For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)