Once year end is complete, if you wish to view historical assessment data please go to Reporting > Assessment.
Pick the report you wish to view e.g. Checkpoints. In this report select the academic year and the year group the student will be in in September and choose.
This will show their data from the previous academic year.
In the instance of a student who will be year 2 in September in the filters select academic year and year 2. This will show their year 1 data.