ClassroomEvaluate & SamplePrivate, Charter, and Other SchoolsEarly Childhood Programs Early Childhood Early Childhood Program Options Houghton Mifflin Harcourt’s Early Childhood suite of products blends traditional teaching methods with interactive online discovery to create a fun learning environment and foster cognitive, emotional, and fine-motor skill development. Classroom management tools, including a steady continuum of lessons and multi-sensory offerings, help your school’s educators ensure success with group activities. Leveled Readers & Bookrooms Grades Pre-K–12 Reach every reader and build confidence with engaging titles. Learn More Literacy by Design® Grades K–5 Empower students with gradual release of responsibility and a balanced literacy approach. Learn More iRead® Grades K–2 Close the achievement gap early with this adaptive, digital foundational reading program. Learn More Math Expressions Common Core Grades K–6 Raise student achievement with standards-based instruction. GO Math!® Grades K–8 Ensure depth of instruction with engaging, interactive approach to math. Learn More ScienceFusion® Grades K–8 Build inquiry and STEM skills with this state-of-the-art program. Learn More Curiosityville® Pre-K Support learning at school and at home with digital games and activities. Learn More Big Day for PreK™ Pre-K Ensure kindergarten readiness by building the foundation for success. Learn More Don’t see what you’re looking for listed here? Check out all of our educational curriculum offerings. READ 180®, Go Math!®, Literacy By Design®, Curiosityville® and design, HMH®, Houghton Mifflin Harcourt®, ScienceFusion®, and Big Day for PreK™ are trademarks or registered trademarks of Houghton Mifflin Harcourt. Curiosityville is a registered trademark of Curiosityville LLC. Copyright © Curiosityville, Inc. All rights reserved. Curiosityville is a Houghton Mifflin Harcourt Company.