Add It Up (Show Your Thinking)” is a 2-minute, kid-friendly math song for Grade 1 that teaches core vocabulary— sum (total), addends, equal, equation/number sentence—and models addition strategies: count on, number line, ten frame, make a ten, doubles/near doubles, number bonds, and count on to find the unknown. Built with call-and-response and movement cues, it reinforces math talk using real teacher prompts (“Show what you’re thinking,” “How did you get that answer?”). Perfect for warm-ups,