Add Nested Formula To Cell On Another Worksheet

One of my macros is a tied to a worksheet_change. The macro runs and gives me the result that i want, however excel flips to the sheet that the sub is running for.

example:

Sheet1, Change the cell
excel flips the visible to sheet2
macro runs

Its kinda of annoying. I would like excel to stay on sheet1 where i am trying to finish data entry. I suspect it is how i have writen the macro. Any help at all on how to clean it up.. or a better way to write the same thing would be very appreciated.


Sub TermPlacement()

' Term_Placement Macro
' Uses the Value of Term to insert a formula repeatedly in a colum.

Dim sNFormula As String
Dim rTerm As Range
Dim rStart_Cell As Range
Dim rNpayment As Range

'The reference cell located directly above the first cell in column
Set rStart_Cell = Worksheets("Floor Plan").Range("$B$13")
'Additional set values....................