2 Added punctuation so that the sentences are grammatically correct in the most minimal sense.
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Let the student decide if they want crib notes. It should be a test that shows the student can problem solve why. Why make it a memory test that causes the student to fail.? Create the test so that the student is successful  .

Let the student decide if they want crib notes. It should be a test that shows the student can problem solve why make it a memory test that causes the student to fail. Create the test so that the student is successful  

Let the student decide if they want crib notes. It should be a test that shows the student can problem solve. Why make it a memory test that causes the student to fail? Create the test so that the student is successful.

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Let the student decide if they want crib notes. It should be a test that shows the student can problem solve why make it a memory test that causes the student to fail. Create the test so that the student is successful