HuffPost has so many typos, spelling errors and usage inconsistencies that it's difficult to tell whether this headline is an especially unfortunate mistake or intentional. The column is about the struggles of English-language learners. (Following up: HuffPost corrected it a day later.)
While he's focusing on HuffPost, here's another headline worth discussing:
Mr. Rewrite considers this poor possessive use. It suggests that he has more than one kid in one class, but Rewrite Jr. is more than enough one teacher. Unless the story is about parents with twins in the same classroom, the wiser choice to complement kids' would be teachers, matching plural with plural.