HMH is a global leader in Pre K-12 educational content and services, combining digital innovation and research to make learning more engaging and effective. Free Services Offered: To show our commitment to the education ecosystem during this unprecedented time of interrupted instruction, we are temporarily offering free access to our supplemental Waggle program. Waggle supports virtual learning, instruction, practice, and assessment for Mathematics and Reading for 2nd through 8th grade. It is adaptive and Common Core-aligned. Please visit to begin the redemption process.