A likely way to sign it would be to combine signs for:
* MASTER'S: The sign for "master" (often a handshape depicting a graduation cap) followed by the sign for "degree" (often a circular motion near the temple).
* EARLY CHILDHOOD: You might sign "early" (often a motion like a sunrise) followed by "child" (pointing to a child-like position) and "education" (often a gesture like writing or opening a book).
Therefore, you would sign the individual components in sequence: MASTER'S DEGREE then EARLY CHILDHOOD EDUCATION. The fluency and exact handshapes would depend on the signer's style and the specific sign language (e.g., American Sign Language or British Sign Language).
It's important to note that you can't just find a single "word" sign for this phrase. It's a concept that requires breaking down and combining existing signs.