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In-Class/On-line Group Inquiry/Discussion
The following arithmetic questions show systematic subtraction error responses for five different children. There are three sample errors for each child, so each question in a set of three responses contains the same error. What is each student doing/thinking? -------------------------------------------------------------------------------------------------- Sample Response What's the student doing? What could you suggest to remediate this problem? --------------------------------------------------------------------------------- 37 43 85 -4 -1 -3 ---- ---- ----- 23 32 72 ------------------------------------------------------------------------------------------------ 32 50 24 -6 -8 -5 ---- ---- ---- 34 58 21 ------------------------------------------------------------------------------------------------ 53 72 45 -14 -56 -19 ---- ---- ---- 49 26 36 -----------------------------------------------------------------------------------------------
The following arithmetic questions show systematic addition error responses for five different children. There are three sample errors for each child, so each question in a set of three questions contains the same error. What is each student doing/thinking? ----------------------------------------------------------------------------------------------- Sample Responses! What's the student doing? ------------------------------------------------------------------------------- 76 205 754 +17 +86 +28 ----- ----- ----- 25 21 26 --------------------------------------------------------------------------------------------- 519 345 483 +82 +76 +57 ----- ----- ----- 511 511 711 -------------------------------------------------------------------------------------------- 46 21 15 +3 +8 +2 ----- ----- ----- 43 13 13 ------------------------------------------------------------------------------------------- 46 21 15 +3 +8 +2 ---- ---- ---- 79 109 37 ------------------------------------------------------------------------------------------ 48 79 26 +3 +9 +7 ---- ---- ---- 411 718 213 ---------------------------------------------------------------------------------------- |
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