Affordance and constraints can be look as the "pros and the cons". Affordance in technology is the tool being used to make a concept or action particularly useful. Then, the constraint becomes the limitations a student and teacher may come in contact with while using that particular tool. The objective of affordance in technology is defining what that tool can do for the students and how its meeting the standards. For example, when determining the affordance of a tool it's important for the teacher to evaluate it: How does it support 21st Century skills? How flexible is this tool? (Mark, Fijor). This framework helps deepen the understanding of how
technology relates and affects pedagogy, and vice versa. It also puts
the focus of integration on the learning task or activity, rather than
the tool (Mark, Fijor).
More over, constraints in technology are simply what limits the affordance. For example, when using technology such as "Popplet", a soft ware for concept mapping, it's important to consider if every student is familiar with it. If the teacher only offers Popplet for concept mapping, some students might be discouraged from their work if they can't maneuver it. Once the tool is evaluated the teacher can determine if it's something she should use in her/his pedagogy. Consequently, it can be decided if this tool is worth using or not. Some of the affordances of using Popplet is that it can be convenient to create diagrams online; still there may be other problems limiting other students. It's important to consider the meaning of technology "affordances and constraints" in education because it can make teaching methods efficient and simple. I think its also important to understand that incorporating technology in the classroom is crucial but it it also essential to evaluate the "affordances" and "constraints" of it.
More over, constraints in technology are simply what limits the affordance. For example, when using technology such as "Popplet", a soft ware for concept mapping, it's important to consider if every student is familiar with it. If the teacher only offers Popplet for concept mapping, some students might be discouraged from their work if they can't maneuver it. Once the tool is evaluated the teacher can determine if it's something she should use in her/his pedagogy. Consequently, it can be decided if this tool is worth using or not. Some of the affordances of using Popplet is that it can be convenient to create diagrams online; still there may be other problems limiting other students. It's important to consider the meaning of technology "affordances and constraints" in education because it can make teaching methods efficient and simple. I think its also important to understand that incorporating technology in the classroom is crucial but it it also essential to evaluate the "affordances" and "constraints" of it. 
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