I received a paper planner every school year from elementary school until I went to college. In elementary school the teacher would stand over us while we wrote in it.

I constantly would forget it at school. It would get lost at home. If the teacher wasn't reminding us about long running projects from weeks ago it would just be forgotten since I wasn't looking that far back.

Then I got to college and someone showed me that they put their assignments in their Google calendar and told me I could set up alerts in my email and later my phone. There were never any forgotten assignments ever again. Paper planners are provably worthless to me.