You can move or reorder module items after you've added them to a module. You can manually drag and drop the module item, or you can use the Move To option, which is also accessible for keyboard users.
In Course Navigation, click the Modules link.
Drag and Drop Module Item
You can use the drag and drop option to reorder module items. Click the drag handle next to the module item name. Drop the module item in the desired location by releasing the mouse.
Move Module Item
You can also use the Move To option to reorder a module item. Click the Options icon  and select the Move To... link .
In the Move Module Item sidebar, click the Modules drop-down menu , then select a module from the list . If you want to keep the item in the existing module, select the existing module name. However, if you want to move the item into another module, select the new module name.
Place Module Item
In the Place drop-down menu , select the placement of the item you are moving . You can move the module item so it is the first item module item, before a specific item, after a specific item, or the last module item.
Place Before or After
If you selected the Before or After option, click the third drop-down menu . Select the module item that should be before or after the module item you are moving , as indicated by the option selected in the previous menu.
If you want to move the module item to another location, change the sidebar placement options again.