When using Safari on an iPad, teachers cannot enter attendance or grades through Enter Grades by Class.
Download and install the latest patch, which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.
Note: After installing the update, you may need to clear the cache in order for the changes to take effect on the iPad. To clear the cache for Safari, go to Settings, Safari and select Clear Cookies and Data.