Pupils have joined the school since the tests so their results are not showing on the marksheets.
They need to be entered in the same way they would have been at the time.
Go to Tools>Performance>Assessment>Wizard Manager
Choose the previous year’s wizard eg Key Stage 1 2015 click Next
Use the browser to populate with the group the pupils are currently in click Next
Choose the required marksheet Click Edit (Pencil on the right)
Pupils should then appear
Enter data in the usual manner