If you are looking for some extra help, consider these options:
Look through the Example Problems. Example problems from MathWorks® staff are provided to help you write problems and assessments. These example problems illustrate good practices for authoring problems and creating assessments to test the accuracy of leaner submissions.
visit MATLAB Answers in MATLAB® Central. MATLAB Central has a community of experts who can answer questions about creating good assessments, methods to prevent learner cheating, and more.