Your own share of the mosaic
Shade a half, third or fourth in more than one way.
Explore this lesson →6 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Equal shares cover the same amount of one whole, with no gaps or overlaps.
- Two halves, three thirds or four fourths make a whole. A fourth is also called a quarter.
- Equal shares of identical wholes can have different shapes. Compare their areas, not just their outlines.
Something to notice
Observe physical folding/cutting, free drawings, explanations of equal areas, and transfer to new wholes. The guided cuts use fixed radial or parallel boundaries; other mathematically valid partitions exist. Tile shading accepts any subset of the requested area, including disconnected regions. Grade 2 uses share words; formal fraction notation is introduced in Grade 3. Software checks and mappings do not establish mastery or replace educator/learner review.
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 2 · 2.G · 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.