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 Settings icon  and select the Move To... link .
View the item's current module in the module menu . If you want to move the selected module item into another module, select the new module name.
Select the button for whether you want to move the selected module item before or after another item in the module .
In the module item drop-down menu , select the item that should be before or after the item you are moving, as indicated by the button selected in the previous option.
Click the Move button .