The SAMR Model was developed by Dr. Ruben Puentedura. It enables educators to analyse how effective their use of technology is on teaching and learning. The model ranges from Substitution to Redefinition and the supposed impact on learning at the higher levels is greater.
https://thatedtechguy.wordpress.com/2015/03/09/guide-using-the-samr-model-to-guide-learning/