Copy a piece, build a fraction
Build a requested fraction while keeping its reference whole fixed.
Explore this lesson →10 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Choose one whole and divide it into equal parts. One part is a fractional unit, such as one fourth.
- Copy that same unit to build an amount. Five fourths means five copies of one fourth; it is more than one whole.
- The denominator tells the size of the equal unit part. The numerator counts copies of that part. Every extra strip is another copy of the same whole.
Something to notice
Ask the learner to identify one whole, show a unit fraction and build an unfamiliar fraction using copies. Include an amount greater than one and an unequal partition. The API checks selected units or entered fraction form; it does not judge oral or free-written explanations. Number-line, equivalence and comparison instruction follow separately.
Try it. Change it. Explain it.
Open the lesson to use its pictures and controls. In How it works, connect the picture to the idea. In Play & discover, change the quantities and notice what stays the same. In Your turn, answer questions and use the explanation to check your reasoning.
You can ask for help, draw on the thinking pad, or listen to the question and answer options. Progress distinguishes independent work from work completed with help.
Let’s try it →Curriculum connection
Grade 3 · 3.NF · US Common Core
This lesson is mapped to these standards. A completed activity is practice evidence, not a claim of mastery. Content is checked against the linked official standards and its mathematical models are tested.