Discrete Trials are an Evidence Based Practice for Autism. These lessons are perfect for the special education classroom.Included in this download is everything you need to teach students to discriminate shapes through Discrete Trial Training. Included are the stimulus cards for 16 shapes:rectangle, circle, square, triangle, oval, heart, star, pentagon, arrow, trapezoid, hexagon, octagon, cylinder, cube, parallelogram, crescent.Stimulus cards are in both color and black line.Also included are d