You will need time to work through the materials. It will take time in studying and practice to learn to recognize the different question types and how to work through them efficiently and effectively. All students work at a different rate. You will be ready once you have gone through the materials, taken the practice tests and have given yourself enough time to digest the work. We recommend studying for an average length of 3 consecutive hours every day and taking the actual test approximately three weeks after the end of the course.
Regarding practice problems, you should go through all available practice questions, all questions in three Official Guides and make sure you time yourself once you feel ready to take a mock test.
If you need more work on specific areas of study after the class, private one-on-one tutoring is a great option to help you refresh on the material and focus on your weak areas. For more info on our tutoring services, please visit:
https://www.manhattanreview.com/gmat-tutoring/If you have less than three weeks between the last session of your course and your test, do not worry about it! Just try to focus on your main weaknesses and solidify your strengths and give it your best on the test!