The homework policy in our classroom is typically students will receive the homework packet on a Friday, and it will be due the following Friday. If there is no school on a Friday, it will be due the following Thursday. Students can work on their homework over the weekend, or as much as they want to each day, the reason I give you one week to complete it is so that you can work around your busy schedules. Some students complete it over the weekend, some like to work on it in two nights, and others like to work on it nightly. There's at least 20 minutes of required reading with a reflection log, 10 minutes of math, and 10 minutes of spelling/vocabulary practice. You are to work no longer than 10 minutes on Mathematics, if it takes longer than 10 minutes, then you can absolutely draw a line and put a parent or guardian signature. If you'd like to do I-Ready Reading or Math tutoring lessons instead, there's an option for that as well.
While there are no studies that show homework leads to improved academics, it does show that those who consistently complete homework outside of school, learn pacing, self-regulation, organization, and time management skills that do become beneficial in the secondary school system. So that is why we push homework in Elementary.