In one sentence, describe what the following article is about:

If you apply for the examination online, you will be required to pay by credit card. Visa, Mastercard, American Express, Discover are all accepted. If you submit a paper application, you'll need to give your credit card number, or include a cashier's check or money order for the full amount. If you cannot afford to pay the examination fee, there are reduced fee and scholarship programs available through the NAECB. There are over 110 assessment centers throughout the United States and Puerto Rico. The exam will be administered on the computer, by appointment only, and on weekdays. You will be required to complete the examination within 3.5 hours.  In order to be allowed to take the test you will need to show the examiner two forms of identification. Before you take your official, timed exam, you can take a practice test. Whether you do the practice exam is up to you but taking it will not cut into your overall time for the official exam. A passing score it between 75 and 100 points out of 100 points. If you don't pass the exam on the first attempt, it's not the end of the world. You can take it again within 12 months of your application date. However, the fee to repeat the examination is $195. You will need to schedule your retake through the NAECB, just as you did for the first test. In order to renew it you will need to prove that you have completed 1000 hours of work in asthma education and you will need to pay a recertification fee. Once you have renewed, your new certificate will be good for 5 years. Information about renewal is available on the NAECB website.

Summary:
Pay the examination fee, which is $295. Take the examination at an assessment center. Retake the test if you don't pass the first time. Get recertified after 7 years.