I often recommend evaluations for children or adults who are struggling at home, work or school. I think knowing strengths and weaknesses can make a huge difference, whether you are considering asking for accommodations or just want to find out what will work best with your or your child's learning style and temperament. Here are some good articles from Understood.org and APA which will help you understand the language, options and process!
Understanding Psychological/Educational Evaluations
Evaluation Terminology: Types of Special Education Evaluations
Evaluations and Independent Educational Evaluation (IEE)
Private Vs. School Testing for Learning Disabilities
Private Evaluation: What You Need to Know