In the past, students gave their teachers an apple as a show of appreciation. While the tradition may not be as common, the symbolism of the apple as a symbol of appreciation for teachers remains ingrained in popular culture.

The tradition of students giving teachers an apple dates back to the 19th century in the United States. At that time, families often lived on farms, and it was common for children to help with farm work, including harvesting fruits like apples. Families would give these apples to teachers as a token of appreciation for their hard work and dedication to education.

The apple became a symbol of gratitude and respect for teachers' role in nurturing and educating children. Additionally, apples were a practical gift as they were readily available and could be easily transported to school.

Over time, the tradition evolved, and giving an apple to a teacher became a symbolic gesture of appreciation rather than a practical necessity. 

Today, students and their parents gift teachers cards, mugs, t-shirts, pen sets, and apple decor to express their gratitude for all the teacher has done for them throughout the year. 

In the format of digital ecards, teacher appreciation typically features a  message that not only expresses their gratitude but also the admiration and thanks for their dedication to their students.  Common themes include acknowledging their impact on students' lives, recognizing their passion for teaching, and highlighting their contributions to education. These animated cards often include heartfelt messages, words of encouragement, and sometimes quotes or poems that celebrate the teaching profession.