Individuals who have difficulty using a tool for anything other than its proper use may have difficulty solving a problem due to
a. experiencing mental set
b. imposing unnecessary constraints
c. experiencing functional fixedness
d. focusing on irrelevant information

Individuals which would have such difficulties would most likely report that they're experiencing funcitonal fixedness - C. This is a phenomenon in which people cannot use certain tools for anything other than their official and proper use for which they were intended.

Maybe meditation,stress relievers,try to have quite time try to get school done on time and try to go to bed earlier