Math Group 4 (Lesson 4.1): Subtraction Board Introduction, Booklet, Control Chart

0:00 intro
1:52 Materials Needed
4:52 Set-up
5:43 Orientation to Material
7:24 Language for Subtraction
8:42 Orientation to Booklet
10:13 Table of 18
12:10 Table of 17
14:13 Table of 16
15:02 Control Chart
17:13 Elementary Use
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