Not only the last name: 5th grade math lesson

What this lesson shows

Fixes a mistake

A square is still a parallelogram. The most exact name is not the only one.

The worked example

The lesson works this one step by step: a square, a parallelogram. Then your kid tries one like it on paper.

The steps

Not only the last name
Check the family rule
Try the other way round

Helping at home

The most exact name is not the only one. To decide if a shape is in a family, check the family rule against the shape. Then ask the other way round: it may be only sometimes true.

If your kid gets stuck

Check the family rule against the shape.

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.

See how Lux works

Standards

Common Core 5.G.B.3
Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.

Matches standards in 49 statesSee each state's code

Alabama MA19.5.21, MA19.5.23
Alaska 5.G.3, 5.G.4
Arizona 5.G.B.3
Arkansas 5.GM.1
California 5.G.B.3
Colorado 5.G.B.3
Connecticut 5.G.B.3
Delaware 5.G.B.3
District of Columbia 5.G.B.3
Florida MA.5.GR.1.1
Georgia 5.GSR.8.1, 5.GSR.8.2
Hawaii 5.G.B.3
Idaho 5.G.B.3
Illinois 5.G.B.3
Indiana 5.G.1, 4.G.3
Iowa 5.G.B.3
Kansas 4.G.2, 5.G.3
Kentucky KY.5.G.3
Louisiana 5.G.B.3
Maine 5.G.B.3
Maryland 5.GR.B.2, 5.GR.B.3.a, 5.GR.B.3.b
Massachusetts 5.G.B.3
Michigan 5.G.B.3
Minnesota 4.3.1.1
Mississippi 4.G.2, 5.G.3
Missouri 5.GM.A.1
Montana MT.5.G.3, 5.D1.4, 5.D2.2
Nebraska 5.G.1.c
Nevada 5.G.B.3
New Hampshire 5.G.B.3
New Jersey 5.G.B.3
New Mexico 5.G.B.3
New York NY-4.G.2.a, NY-5.G.3
North Carolina NC.4.G.2, NC.5.G.3.a
Ohio 5.G.3, 5.G.4
Oklahoma 5.GM.1.1
Oregon 5.GM.B.3
Pennsylvania CC.2.3.5.A.2
Rhode Island 5.G.B.3
South Carolina 4.MGSR.3.1, 4.MGSR.3.2
South Dakota 4.G.A.2, 5.G.B.3, 5.G.B.4
Tennessee 5.G.B.3
Texas 111.6.b.6.C, 111.7.b.5
Utah 5.G.3
Vermont 5.G.B.3
Virginia 4.MG.5c, 5.MG.3b, 5.MG.3c, 5.MG.3d
Washington 5.G.B.3
West Virginia M.5.25
Wisconsin M.5.G.B.3

Not only the last name