A habit corrector appliance including a front portion, a first ramp and a second ramp extending from the front portion. The first ramp is located at a high position adjacent to or at a user's palate to ensure the tongue is positioned at the palate which widens the palate and which also prevents or reduces mouth breathing. The second ramp is located at a position lower than and beneath the first ramp, wherein the second ramp substantially prevents the tongue from entering a lower space within the oral cavity, wherein the first ramp aids in an elevated tongue position and the patient learns to swallow with the tongue elevated to substantially reduce or prevent air from entering the oral cavity through the mouth and to prevent mouth breathing. Slits at the ramp sides allow for lateral expansion of the appliance. Lingual tabs promote proper anterior positioning of the jaws. A lingual wire with narrower anterior wire extensions can provide a widening of the arch and movement of the upper incisors and maxilla in a forward position.