How to lock cells in Excel

There were times that we students don't want to show how we came up with calculations to our teachers or peers for fear of them using it to their advantage for submitting their sheets in lesser period of time, when you have done all the researching and they will simply benefit from it. Call it selfish but for me it's precaution, so they will do their part.

Here's how:
1. Select all the cells of the sheet.
    Right click any cell, Format Cells
    @ Protection Tab, uncheck Locked
    OK
2. Select all the column or select the group of cells to lock
    Right click, Format Cells
    @ Protection Tab, check Lock
    OK
3. @ ribbon, click on Review Tab
    Protect Sheet
    Tick all except Locked Cells
    Put password on top, reenter password, OK

To end: count then share blessings like Web traffic exchange to others