The initial results seemed promising, but the final effects were kind of disappointing.
In the given sentence above, the unnecessary qualifier that needs to be removed is "kind of". It is an informal expression which is usually used as meaningless fillers. So, the final sentence will be:
The initial results seemed promising, but the final effects were disappointing.
“I believe a longer spring break will help students perform better in school. After a week away from their studies, students will be refreshed and able to concentrate until the end of the school year”
This states your stance and reasoning.
