• The Reading Horizons Discovery Curriculum is based on a proven method that clearly explains each skill needed for proficient reading and spelling. Reading Horizons is based on a method that provides explicit, systematic, and sequential instruction in decoding, spelling, and pronunciation strategies. The curriculum is implemented in K-3 classrooms through both teacher and software-led instruction. Our students enjoy marking and "proving" words. We are seeing great gains since implemeting the Reading Horizons methodology.