Macro to fill data from sheet to another sheet - excel

Question

Hi I have created macro where it opens the sheet based on user input,
what I need is once the new sheet is opened I have some fields where user need to fill those data(Different subjects marks) and calculate the percentage using formula then I need to fill those data to another sheet named "Data" without overwriting previous data?.
Please suggest how to add data without overwriting in vba.
Sub open_sheet()
Dim sourcesheet As Worksheet
Dim ClassA As Worksheet
Dim ClassB As Worksheet
Dim ClassC As Worksheet
Set sourcesheet = Sheets("Main")
Set ClassA = Sheets("Class A")
Set ClassB = Sheets("Class B")
Set ClassC = Sheets("Class C")
If sourcesheet.Range("Class").Value = "Class A" Then
Worksheets("Class A").Activate
ElseIf sourcesheet.Range("Class").Value = "Class B" Then
Worksheets("Class B").Activate
Else:
Worksheets("Class C").Activate
End If
End Sub

Answer 1

Copy Cell Values to Another Worksheet
Option Explicit
Sub CopyData()
' Reference the workbook.
Dim wb As Workbook: Set wb = ThisWorkbook ' workbook containing this code
' Reference the source worksheet.
Dim sws As Worksheet: Set sws = wb.Sheets("Main")
' Reference the source range (the values from these cells will be copied).
Dim srg As Range: Set srg = sws.Range("A3,B4,C5")
' Retrieve the destination worksheet name.
' Hopefully you have created a drop down to easily select the class.
Dim dName As String: dName = sws.Range("Class").Value
' Late at night (tired), a final check could become a life saver:
Dim Msg As Long
Msg = MsgBox("This will copy to """ & dName & """." & vbLf & vbLf _
& "Are you sure?", vbQuestion + vbYesNo)
If Msg = vbNo Then Exit Sub
' Reference the destination worksheet.
Dim dws As Worksheet: Set dws = wb.Sheets(dName)
If dws.FilterMode Then dws.ShowAllData ' 'Find' will fail if 'dws' filtered
' Reference the first (available) destination cell.
Dim dCell As Range ' First Destination Cell
With dws.UsedRange
Dim dlCell As Range ' Last Cell
Set dlCell = .Find("*", , xlFormulas, , xlByRows, xlPrevious)
If dlCell Is Nothing Then Exit Sub ' empty worksheet
Set dCell = dws.Cells(dlCell.Row + 1, "A") ' below last in column 'A'
End With
' Copy the values from the source to the destination cells.
Dim sCell As Range
For Each sCell In srg.Cells
dCell.Value = sCell.Value
Set dCell = dCell.Offset(, 1) ' next, adjacent to the right
Next sCell
MsgBox "Data copied.", vbInformation
End Sub

Answer 2

In general, here's a way to append info to a table. I would just put your average calculations in the table total row.
Option Explicit
Sub FillNewRow1()
Dim Class_A As Worksheet
Dim ClassName As String
Dim DataRange
Dim lRow As Long
ClassName = Worksheets("Master").Range("B2").Value
Set Class_A = ThisWorkbook.Worksheets(ClassName)
DataRange = Worksheets("Master").Range("B5:B8")
lRow = Class_A.Range("A" & Rows.Count).End(xlUp).Row + 1
Class_A.Range("A" & lRow).Resize(1, UBound(DataRange, 1)).Value = _
Application.Transpose(DataRange)
End Sub
But seeing as we have no idea what your source od destination data look like that's the best help I can give.
Suplimentary :
PivotCharts & Pivot Tables are awesome: