Computing average to be linked in another sheet

I want to get the average of ratings of each teacher from "Summary" sheet to be put in the "Efficiency" sheet.

=IF(INT(AVERAGE(OFFSET(Summary!$D12, 0,INT((COLUMN()-1)/16)*16,1,5), OFFSET(Summary!$D13, 0,INT((COLUMN()-1)/16)*16,1,5))) = F$16, AVERAGE(OFFSET(Summary!$D12, 0,INT((COLUMN()-1)/16)*16,1,5), OFFSET(Summary!$D13, 0,INT((COLUMN()-1)/16)*16,1,5)), "")

=IF(INT(AVERAGE(OFFSET(Summary!$D3, 0,INT((COLUMN()-1)/16)*16,1,5), OFFSET(Summary!$D4, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D5, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D7, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D8, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D9, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D10, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D11, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D12, 0,INT((COLUMN()-1)/16)*16,1,5))) = F$16, AVERAGE(OFFSET(Summary!$D3, 0,INT((COLUMN()-1)/16)*16,1,5), OFFSET(Summary!$D4, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D5, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D7, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D8, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D9, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D10, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D11, 0,INT((COLUMN()-1)/16)*16,1,5),OFFSET(Summary!$D12, 0,INT((COLUMN()-1)/16)*16,1,5)), "")