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</html><thumbnail_url>https://i0.wp.com/additioapp.com/wp-content/uploads/2016/05/additio-blog.jpg?fit=1120%2C626&amp;ssl=1</thumbnail_url><thumbnail_width>1120</thumbnail_width><thumbnail_height>626</thumbnail_height><description>Additio launched the program for certified teachers 15 days ago, known as Additio Certified Teacher, the first certification program for teachers of a digital gradebook and we can assert that it has been an astounding success. We have received many requests and many of the teachers and trainers who applied, they have already done the [&hellip;]</description></oembed>
