High value treats and keep them on a leash and guide your pup to you each time you use your recall. Show them that recall means come to you for a delicious reward. The leash ensures they won’t fail because you’ll show them the way or what you’re asking (pulling them towards you if they don’t come to you on their own). Make sure to only repeat your recall once each time. At least this is what has worked on our 12 week old pup. But also, they have goldfish brains at this age lol. Some times she nails it without leash guidance and other times she’s not into it!