You can find out how to register to take the Praxis Core by going to the ETS website. The Praxis Core is offered during testing windows at more than 300 Prometric testing sites across the country. Contact your local testing site for specific questions regarding its testing windows. Test-takers must register at least three days prior to their intended test date, and you must pay the testing fee online. At the time of this writing, individual tests (reading, writing, or mathematics) cost $90; the price to take all three tests at once (on the same day) is discounted to $150.
After you register, read all the admission ticket info to make sure all the content is correct. Contact ETS if you have any disabilities that require accommodations.
Consider taking one test per day instead of multiple tests per day. You know your limits and abilities. Some people take all three tests on the same day, and they bomb all three. If you aren’t super confident that you can pass multiple tests in one sitting, you may want to schedule them for different days. This approach will also help you map out your study plan more strategically (see the next section). You can study for one test at a time instead of all three.