What this lesson shows
Cut a rectangle down, across, or corner to corner. Each way gives two halves.
The worked example
The lesson works this one step by step: rectangle (question 1). Then your kid tries one like it on paper.
The steps
- Down the middle
- Across the middle
- Corner to corner
Helping at home
Cut paper rectangles down, across, and corner to corner. Each cut through the middle makes 2 equal parts.
If your kid gets stuck
Is it cut through the middle?
Watch it with Lux
With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.
Standards
- Common Core 1.G.A.3
Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
Matches standards in 50 statesSee each state's code
- Alabama MA19.1.23a, MA19.1.23b
- Alaska 1.G.3
- Arizona 1.G.A.3
- Arkansas 1.NPV.8
- California 1.G.A.3
- Colorado 1.G.A.3
- Connecticut 1.G.A.3
- Delaware 1.G.A.3
- District of Columbia 1.G.A.3
- Florida MA.1.FR.1.1
- Georgia 1.GSR.4.3
- Hawaii 1.G.A.3
- Idaho 1.G.A.3.a, 1.G.A.3.b
- Illinois 1.G.A.3
- Indiana 1.G.3
- Iowa 1.G.A.3
- Kansas 1.G.3
- Kentucky KY.1.G.3
- Louisiana 1.G.A.3
- Maine 1.G.A.3
- Maryland 1.NOS.F.14
- Massachusetts 1.G.A.3
- Michigan 1.G.A.3
- Mississippi 1.G.3
- Missouri 1.GM.A.4
- Montana MT.1.G.4
- Nebraska 1.G.1.d
- Nevada 1.G.A.3
- New Hampshire 1.G.A.3
- New Jersey 1.G.A.3
- New Mexico 1.G.A.3
- New York NY-1.G.3
- North Carolina NC.1.G.3.a, NC.1.G.3.b, NC.1.G.3.c
- North Dakota 1.NO.NF.1, 2.NO.NF.3
- Ohio 1.G.3
- Oklahoma 1.N.3.1
- Oregon 1.GM.A.3
- Pennsylvania CC.2.3.1.A.2
- Rhode Island 1.G.A.3
- South Carolina 1.NR.4.1, 2.NR.4.2
- South Dakota 1.G.A.3
- Tennessee 1.G.A.3
- Texas 111.3.b.6.G, 111.3.b.6.H
- Utah 1.G.3
- Vermont 1.G.A.3
- Virginia 1.NS.3a, 1.NS.3b, 1.NS.3c
- Washington 1.G.A.3
- West Virginia M.1.22
- Wisconsin M.1.G.A.3
- Wyoming 1.G.3a, 1.G.3b, 1.G.3c, 1.GP.3.A, 1.GP.3.B, 1.GP.3.C