There will come an age when grades matter... But grade 2 shouldn't be it.
Unfortunately, at least in the US, according to this
linked government factsheet, data is being collected from PRESCHOOL through K-12 to post-secondary and workforce. This Longitudinal data may kept throughout the individual's lifespan and beyond.
Grade 2 may be the 4th year of data collection on the student (1=PK4, 2=K5, 3=Grade1, 4=Grade2), including test scores, teacher's names, grades earned, and more.With Common Core, data collection, and equal outcomes, the government schools which children attend today are significantly different than the public schools which their parents may have attended more than a decade ago.