Not many of you should presume to be teachers, my brothers and sisters, because you know that we who teach will be judged more strictly. (NIV)

NOT MANY [of you] should become teachers (self-constituted censors and reprovers of others), my brethren, for you know that we [teachers] will be judged by a higher standard and with greater severity [than other people; thus we assume the greater accountability and the more condemnation]. (AMP)

My brethren, be not many masters, knowing that we shall receive the greater condemnation. (KJV)