I am designing a task for my teaching practicum. Does the rationale sound alright [especially in terms of grammar]?
I want to teach how to write a letter of application. Thanks a lot

Rationale: As this group of students are about to graduate from their secondary schools in 1-2 years, they should be equipped with various skills useful in their ‘job-hunting’. A fabulous letter of application is usually the sine qua non of ‘being granted’ an interview at which final decisions can be made by the employers; however, without a well-written letter of application, one is likely to fail to get the job no matter how much potential one has. Being able to write a good letter of application is thus of paramount importance for these ‘job-seekers-to-be’.