Hello Aspirant,

It is quite good to take coaching in the course you lack behind/ to improve the skills in that course. If the coaching course is in your curriculum then if the teaching is good then it is good to attend in the weekends else manage your schedule a go in the weekdays. 

Take coaching in the course you lack. Do not rush and take coaching in all the subjects. It is important to improve your listening and concentration in the classroom.

Hope this will help you. Good Luck.