Taking good photos of your work is all about accurately capturing your work. How you achieve that is up to you. If you need some suggestions, the key aspects of photographing your work are:
The following video does a really good job of covering all the basics.
Good lighting is essential to taking good photos. The basic rule is to make sure you get enough light on your subject that your photos aren’t dark, and not so much that details get washed-out.
Good and bad examples
The above photo is a prime example of a bad photo. The work is crooked and on an angle, there’s too much light on half the work, the rest of the work is obscured by shadow, and the background is very distracting. This would be very difficult for a tutor to properly evaluate.