MATH IS SUBITIZABLE
The ability to know how many there are of something without counting! Very cool and it is an innate ability. We can use this ability to build our number sense. This is a growing collection of subitizing sets. We go from counting to the use of the Distributive Property. Enjoy!
RESEARCH FOUNDATION
Subitizing: What is it? Why Teach It? by Douglas Clements
MOVING FROM COUNTING ALL TO SUBITIZING
This collection shows dots that are in various configurations. Slide #2 shows a year-long progress based on the models from Number Talks by Sherri Parrish, pg. 71 - 81
This collection shows dots that are in various configurations. Adapted from the models from Number Talks by Sherri Parrish, pg. 90 - 91.
This collection shows dots that are in various configurations. Slide #2 shows a year-long progress adapted from on the models from Number Talks by Sherri Parrish, pg. 91 - 96.
Teen Numbers on a Ten Frame (11 - 19)
This collection show dots on a ten-frame in various configurations. Focuses on the 10 and some more.
ADDITION
SC Make 5
This collection visualized combinations of 5 using dots, ten frames and dominoes. This set emphasizes the Commutative Property of Addition.
SC Five Plus More
This collection visualizes and emphasizes 5 plus some more to 10.
SC Doubles w/ Sums from 0 to 20
Includes dots, ten frames, and dominoes.
SC Doubles Plus 1 w/ Sums to 20
…
SC Doubles Plus 2 (Visual Math Morphing):
SC Doubles Minus 1 (Visual Math Morphing):
SC Doubles Extended w/ Benchmark Numbers from 20 to 100
Ten Frame, Make Ten Extended: Compliments of 100 using multiples of 10, e.g., 30 + 70.
CK Addition to 20 with Double Ten-Frame
CK Extended Addition to 100
Supporting decomposing by place value/partial sums. Ten-Frames: Uses doubles in the tens place. Supporting decomposing by place value/partial sums. Ten-Frames: Uses compliments of 10 in the ones place. Base-Ten Blocks: Uses doubles in the tens place. Supporting decomposing by place value/partial sums. Base-Ten Blocks: Uses compliments of 10 in the ones place.
CK Base-Ten Blocks Addition to 1,000
MULTIPLICATION
Distributive Property
Subitizing Sets
Equal Groups CK
Arrays CK