Learner's permit practice tests are available for free at Driving-Tests.org. The website offers comprehensive information about attaining a learner's permit and includes practice tests. The information is state-specific and covers what is expected to attain the permit in each particular state.
Click the "Let's Start" banner to open a window and make your state selection. After selecting your state, choose from the several available types of learner's permit practice tests. The questions are almost identical to actual DMV tests. Road sign practice tests and true and false Q&As are typical question types. Driving-Tests.org is recognized by the National Safety Council.