Happy Numbers supports ELL students and helps them concentrate only on Math, without being distracted by reading. Every task in the PreK-5 curriculum has a friendly human voiceover in English and Spanish. PreK-1 content has automatic voiceover, and for other grades, sound is available by clicking on the blue microphone sign. Additionally, all benchmark assessments (Placement Test, Mid-Year Test, and End-of-Year Test) have automatic voiceover for PreK-3 grades and support voiceover for other grades by clicking on the microphone.

To explore new vocabulary, in each topic, we introduce every new math word, including synonyms for the same concepts (sum, total, etc.), shape names, position/direction vocabulary (such as above, in front of, down), and comparison vocabulary (taller, smallest, greater than). Students also learn to read written numbers and match written names to numerals.