Inability to manage time is one of the main reasons that contribute to students not finishing their degree programs. It is not easy to juggle work and school together.
Here are a few tips to manage your time effectively:

1.Speakout
Does your school schedule make it possible for you to work?. Does it go along with your workplace?. If it does, you have a chance running both.
If the course you are studying corresponds with your work, it's good. if not, you can meet with your school counselor about courses available online that are related to your work.
Some schools have provision for work-study. So try to find out what support is available. You could also join peer support groups.
Also, talk to your boss for support and be hardworking. You can talk with your boss to avoid heavy assignment that might be time consuming.

2. Set your priority
When you know what you have to do each day and the amount of time available, You can determine what you can accomplish in the time range.
Set your priorities right. Assign a specific time to specific tasks and avoid procrastination. Be smart in prioritizing your tasks such that different tasks have different weights depending on their importance.
Also set time limit for each tasks so that one task does not occupy the whole day.
Once you have you schedule ready, don't make procrastination alter it and you are good to go.

3.Take one step at a time
Just because a degree is stipulated to be 5 years does not mean you have to finish it in 5 years. If the courses taken per semester are too much for you, you can distribute those courses to your own comfort so that you don't become overworked.

4. Share your work
You don't have to do it all. cut out the less necessary tasks to others.
Discuss with your friends and family and get them to help you with a few things.

5. Rest
When schedules get filled up, the first sacrificial lamb is sleep and rest. Lack of sleep and rest affects your health mentally and physically which in the long run takes more time than it would have taken initially.
Take care of yourself and put the time to do so in your schedule.

http://www.africareerng..com/2015/02/how-to-survive-juggling-between-school.html