Ensure the spreadsheet is not too large so presentation will be clear on screen. 

In PowerPoint, display the slide where you want to insert the spreadsheet
Click Insert tab
In the Tables group, click Tables
In the drop down list, click Excel Spreadsheet
Enter data
Save your data at regular intervals

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Keep your Headings [...]

Excel allows you to create many worksheets in a single document. Rename as follows:

Right Click worksheet tab (default name display as ‘Sheet 1′ etc.)
Click Rename
Type new Tab Name
Press Enter on keyboard 

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Keep your Headings in view no matter how far you scroll or how large your spreadsheet is
Print [...]

Click the cell you want to type in
Type the number and do not enter
Hold ALT on keyboard
Type 248 or 0176 on numeric keypad
Release ALT
This entry will remain a value which can be calculated 

If you would like to know how to …

Keep your Headings in view no matter how far you scroll or how large your [...]