Can SWOT Analysis help me find the strengths and weaknesses of my ESL students?

most workable analysis but a little bit time consuming

if you are teaching business English perhaps. But usually a SWOT analysis is done for  business plans and feasibility studies. 

1. A SWOT analysis (alternatively SWOT matrix) is a structured planning method used to evaluate the strengths, weaknesses, opportunities and threats involved in a project or in a business venture.