Do you want to sign the blessing for the teacher? Is it appropriate to say from so-and-so

You can sign it. It depends on the occasion and type. If it's an online blessing, don't write it. It seems too abrupt. As long as it's not sent anonymously, just explain your blessing. The honorific words at the beginning are necessary.

If it is a greeting card or other letter blessing, you can add so-and-so at the end, so that there is a complete ending.

A greeting card is a kind of card that people greet each other when they meet a holiday date or event. People usually give greeting cards on birthdays, Christmas, New Year's Day, Spring Festival, Mother's Day, Father's Day, Valentine's Day and other days. Greeting cards usually have some words of blessing.

The emergence of greeting cards stems from human social needs. It is an emotional communication between people, which is often expressed in short sentences. At first glance, it is concise. Over time, greetings have been stylized, paying attention to celebrating and exchanging auspicious words, conveying people's hopes for life and longing for the future.