Patent US 4,734,036

A teaching aid for reinforcing a student's ability to learn an unfamiliar language includes an upper sheet (12) marked with symbolic indicia to be taught to the student and one or more base sheets (11), each marked with a different translated version of the indicia on the upper sheet. The indicia on each base sheet are marked in registry with the corresponding indicia on the upper sheet. One edge of the base sheet is joined, temporarily or permanently, to a corresponding edge of the upper sheet to allow the upper sheet to be lifted up from the base sheet to briefly expose a corresponding translation, transliteration, interpretation, or paraphrase marked on the base sheet then lowered again so that reading of the upper sheet can be instantly resumed. The upper sheet and the base sheet may be parts of a single sheet having a fold line at the joined edges. The upper and base sheets may be joined at any corresponding edges, but the top edges are preferred for sheets having lengths greater than their widths. The teaching aid is used by reading the text on the upper sheet and by rapidly raising and lowering, or scrolling, the upper sheet to briefly check the corresponding text on the base sheet when necessary.