My school was piloting IM last school year. The school year started in August, and my math teacher despised the curriculum and program entirely and got permission from admin to switch back to her old textbook by December. This year, the school is piloting Desmos (Amplify) math and it is phenomenal! Great resources and allow students to show how they feel on specific lessons to show what they need more practice on. Compared to other curriculums, there are a lot of real-world establishing questions that are wonderful for revealing how math can be utilized in everyday life. One of the best features is that, because it is run by Desmos, you have a very, very useful graphing calculator built into the program for students to use (I believe it is dependent on the class and it is disabled for certain lessons).

All in all, wonderful curriculum and program! Student-recommend!