There were many practices common among modernist poets, such as the following: insistent breaks with the immediate past, its different inventions, "making it new" with elements from culture remote in space and time, the questions of impersonality and objectivity, emphasizing the personal imagination, culture, emotions and memories of the poet. Intellectual statements which the world could relate to were more important than personal statements.
Answer: to portray Huck’s father as uneducated and ignorant.
In this excerpt, Twain most likely uses humour to highlight the absurdity of the father's sentiment. This is done in order to portray Huck's father as uneducated and ignorant. The father tells Huck that he does not see the importance of school. Moreover, he thinks school is damaging because it will teach Huck to feel superior to his dad, who is unlikely to have attended school.