This teacher taught it a lot more thoroughly than I did. Good thing for youtube!
https://www.youtube.com/watch?v=IYQ4epZQ148
Vertical Line Test
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Fighting arithmophobia one student at a time
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Fighting arithmophobia one student at a time
This teacher taught it a lot more thoroughly than I did. Good thing for youtube!
https://www.youtube.com/watch?v=IYQ4epZQ148
Vertical Line Test