The Hot Chalk Lesson Plans page (Lesson plans by teachers for teachers) offers dozens of full, detailed lesson plans across the curriculum, from art and language arts to music and science. They include, writing letters to the Three Wise Men (grades two to four); using the song, Twelve days of Christmas as a basis for the Twelve days of math (“4 adding doubles, 5 pop quizzes, 6 number sentences…”), among many, many others.