What this lesson shows
Fixes a mistake
Clips with gaps count 4, but the pencil is 6 clips long. Clips that overlap count too many.
The worked example
The lesson works this one step by step: a pencil 6 paper clips long. Then your kid tries one like it on paper.
The steps
- Start at one end
- No gaps
- No overlaps
- Count, and say the unit
Helping at home
Read each box aloud. Your kid checks that each clip touches the next, with no space and no overlap, then counts. Try it with real clips on a fork.
If your kid gets stuck
Each clip touches the next. No space, no overlap.
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.MD.A.2
Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.
Matches standards in 49 statesSee each state's code
- Alabama MA19.1.18
- Alaska 1.MD.2
- Arizona 1.MD.A.2
- Arkansas 1.GM.3
- California 1.MD.A.2
- Colorado 1.MD.A.2
- Connecticut 1.MD.A.2
- Delaware 1.MD.A.2
- District of Columbia 1.MD.A.2
- Florida MA.K.M.1.3
- Georgia 1.MDR.6.1
- Hawaii 1.MD.A.2
- Idaho 1.MD.A.2
- Illinois 1.MD.A.2
- Iowa 1.MD.A.2
- Kansas 1.MD.2
- Kentucky KY.1.MD.2
- Louisiana 1.MD.A.2
- Maine 1.MD.A.2
- Maryland 1.GR.A.2
- Massachusetts 1.MD.A.2
- Michigan 1.MD.A.2
- Minnesota 1.3.2.1
- Mississippi 1.MD.2
- Missouri 1.GM.B.7
- Montana MT.1.MD.2
- Nebraska 1.G.2.a
- Nevada 1.MD.A.2
- New Hampshire 1.MD.A.2
- New Jersey 1.M.A.2
- New Mexico 1.MD.A.2
- New York NY-1.MD.2
- North Carolina NC.1.MD.2.a, NC.1.MD.2.b
- North Dakota 1.GM.M.1
- Ohio 1.MD.2
- Oklahoma 1.GM.2.1, 1.GM.2.2, 1.GM.2.4
- Oregon 1.GM.B.5
- Pennsylvania CC.2.4.1.A.1
- Rhode Island 1.MD.A.2
- South Carolina 1.MGSR.1.2
- South Dakota 1.MD.A.2
- Tennessee 1.MD.A.2
- Texas 111.3.b.7.A, 111.3.b.7.B, 111.3.b.7.D
- Utah 1.MD.2
- Vermont 1.MD.A.2
- Virginia 1.MG.1a.i
- Washington 1.MD.A.2
- West Virginia M.1.16
- Wisconsin M.1.MD.A.2