A reading focus card that may be used to isolate a block or line of text and act as a concentrator to encourage and promote left to right eye-tracking. The focus card may be used in a variety of ways and may be provided as a kit and assembled by a user. The focus card includes aligned notches and aligned windows in front and rear sheets opening to a left margin of the card. A transparent plastic insert is installed in the windows. Front and rear sheets are held in assembly by an adhesive that allows the sheets to be picked apart multiple times and different inserts installed depending on the individual needs of the user.