Hello Heeweon. This was a well though out venture. This is an idea that could really have an immediate impact in K-12 classrooms through North America. You plan was solid and attainable and the price point is within a range that public and private school administrators would be willing to spend in an effort to enhance the learning experience in the classroom. My question is which subject areas would you target first? Starting in a concentrated area but ensuring that you have ironed out all the kinks would ensure that you can build the word of mouth market that you would need to encourage other educators to invest in this product.