Try
in A6
=IFERROR(INDEX('MASTER STUDENT LIST'!F$3:F$500,SMALL(IF(('MASTER STUDENT LIST'!$C$3:$C$500=$B$2)*('MASTER STUDENT LIST'!$D$3:$D$500=$C$2),ROW($A$3:$A$500)-ROW($A$3)+1,""),ROWS($A$3:A3))),"")
Enter with Ctrl+Shift+Enter
Copy across and down
I put Class in B2 and teacher in C2 (of "1-206" tab)
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