Encourage the use of the open number line strategy and the importance of “showing your work” with the pages in this pack. I have provided the answer keys for each page, but remember that student may have more than one way to solve each problem. That’s one reason I love the open number line strategy; it gives students room to be creative and it adapts to different mental math abilities, while still giving us the same answer in the end! Another reason why I love this strategy is because it brings in the familiar, addition, to help solve the unfamiliar, subtraction.
I envision these pages being printed out on cardstock and then either being laminated or placed in plastic sheets. This way these can become a part of a self-checking math station for independent and/or partner work. Another option is to print out these sheets for a quick formative assessment. I have provided strategy work pages as well as error analysis pages. This way your students can truly feel like the teacher and correct the “mistakes” of others while all the time thinking deeply about math. I have also provided an Open Number Line tips sheet to help your students ease in to using this strategy.
-6 different open number line practice sheets
-4 different error analysis sheets
-Open Number Line Strategy tip sheet