| 摘要 |
A method comprising illuminating simulated positions of an offensive team and a defensive team, instituting a play by the offensive team by intermittently and sequentially changing the positions of the offensive and defensive teams through the progressive development of the play to its conclusion. An apparatus comprised of a support means, an offensive play sheet on said support means having a plurality of apertures showing optional sequential offensive and defensive positions of players through a given play, a defensive play sheet superimposed with respect to said offensive sheet, and similar to said offensive sheet and also showing some offensive and defensive positions, a master play sheet having apertures depicting a predetermined play sequence compatible with the apertures in said offensive and defensive sheets. Means are provided for moving the master sheet to various compatible positions with respect to the offensive and defensive sheets to show progressively the locations of offensive and defensive positions as the play develops, and a light source to enhance the visibility of aligned apertures in said three sheets.
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