Is this the right test to practice for the mentally challenge kids?

I’m not sure the kind of test you may have in mind; nevertheless, there are a variety of tests that could be administered to mentally challenged kids, all depends on your discretion. Your focus shouldn’t be the type of test to practice; the focus should be the probability that the lesson learned over time is truly grabbed. Some learn visually; in this case, tests may be administered pictorially or perhaps via reading/seeing.

Some are auditory learners; i.e., they most preferably learn by listening, tests, in this case, maybe administered verbally. Others are kinesthetic learners in a sense they learn by moving and doing things. The bottom line is that once you are sure of your teaching mechanisms, i.e., they understood properly what they are being taught either via auditory means, visual means or kinesthetics; you wouldn’t have to worry about the rightness or wrongness of a test to practice in as much it is in the confines of their syllabus.

There are different psychological tests and further tests that can help test those who are considered to be mentally and intellectually challenged. It is obvious that those who have certain mental and intellectual conditions cannot function the same way that “normal” people can function.

They are not expected to do well in the usual tests because they have a different way of processing things. There are some people who may know if someone is intellectually or mentally challenged based on some signs that they may exhibit. One of the most common signs in children is doing the usual development process a bit late, such as sitting up, crawling, and so much more.