CK-12 Foundation
Ck 12: Elem Math: Filling in the Missing or Sign Numbers to 1000
[Free Registration/Login may be required to access all resource tools.] The video works through a 3-digit addition problem to determine if the correct operation for the number sentence is addition or subtraction. The video is followed by...
ClassFlow
Class Flow: Math Meeting
[Free Registration/Login Required] Math flipchart pages on various math concepts: counting, adding, fact families, money, etc.
Illustrative Mathematics
Illustrative Mathematics: Hitting the Target Number
The purpose of this task is to help students develop flexible strategies for adding and subtracting within 20. Students will pick 5 number cards from pre-made cards labeled 1-10. Then, another student will pick a "target number" between...
ClassFlow
Class Flow: Magic Math Squares
[Free Registration/Login Required] Students complete number sentences by inserting numbers in the correct order to arrive at a predetermined answer.
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