If you do not know any reason, watch a video from the Master students of the group PRm-01, who were given the task to find significant reasons why their English teacher would allow them to skip one lesson.  

Such creative tasks #SumDU_translators perform at Practice of English to improve their foreign language skills, to implement written and oral communication, the ability to appreciate the complexity of a communicative situation,  and choose the right communication strategies within the topics studied according to the work program.

 https://www.youtube.com/watch?v=r_pBg0WkbAY&list=UUSHWiIS48Ks1Drx4csurfuRcw