When writing a claim you need to take a stance on a particular issue. In this case the issue is whether or not "standardized tests are the proper measuring sticks for student performance." This stance should be the first part of your claim. Then follow it up with "because..." and your three reasons.
For example, Standardized tests are a proper measuring stick for student performance because they can test a student's knowledge on a wide range of subjects, they are the same for everyone, and they are an accurate indicator of how well a student will do in their future studies especially for fields like medicine and law.
Answer: Yes and No.
Explanation: Fun is when you're having pleasure or amusement in something. Enjoy is taking delight in something. However, it is quite hard to determine a different since if you're having fun, you must be enjoying yourself. And if you're enjoying yourself, you must be having fun.
(I would say they are somewhat synonyms to each other).
Answer:
because you enjoy their time and company so much that when theyre not around its like youre missing a part of yourself