Go to Gradebook.
In the target Sakai site, select the Gradebook tool from the Tool Menu.
Select Import/Export from the actions menu.
Select Custom Export. (Optional)
If desired, you may set the options for customized exports by selecting the Custom Export link.
Choose the items you would like to include in your export.
Check boxes to indicate which items you would like to include in the export.
Select Download Custom Export.
Select Export Gradebook. (Optional)
If you do not wish to set custom parameters for your Gradebook export, select the Export Gradebook button. The .csv file will download in your web browser.