It is hard and nearly impossible to check all students’ work during math. It is especially hard when you have students who struggle with reading or number sense. This math mark will help you differentiate and formatively assess students in a systematic way. You will be less stressed and students will develop a sense of independence and self-responsibility by grading with a partner. This math mark will help manage students during math, using the Envision curriculum. When students check their work with a partner, they engage in practicing the CCSS Math Practice 3--Construct viable arguments and critique the reasoning of others.