We all make mistakes and sometimes assessment data is entered incorrectly. If a students anniversary date has tipped over to the next Standard you can still change the date.
You can change data retrospectively in 2 places:
1. Visit the class page . Click Menu --> National Standards Data. This will give you all the data for this class for each half of the year. Under each set of buttons there is a 'remove this data' link.
2. Visit a students admin page. Click Menu-->Students, select a student. Scroll down to see all the curriculum levels and NS data added for the student. Again you will see the 'remove this data' link. The Curriculum levels are highlighted in pink. The curriculum level is listed in blue text, you can click on this to change or remove completely.