All are free and in public domain. Printing Google Books: Follow the link, right click on the image of the page, and print picture. It will print as a full sized page. Entire books are also downloadable. 
The Lincoln Fourth Grade Reader:
Voices of Spring Poem by William Wordsworth.
Games and Songs of American Children:
Flower Games and the
Birch Broom.
Standard Catholic Fourth Grade Reader:
The Daisy and the Lark by Hans Christian AndersonThe Little Girl's Own Book of Games and Activities:
May Morning.Elementary school.
Three Years with the Poets: A Text-book of Poetry - First grade:
Verses from the Song of Solomon and
Pippa's Song by Robert Browning. Second grade:
April, the Runaway Brook and
Little May Spring,
Song of the Fairy by William Shakespeare More
here, pages 70-76.
Third grade:
pages 103-105 and
131-138.

A little about the
Flower Festivals in Japan from The World and Its People.
For the Story Teller: Story Telling and Stories to Tell:
The Selfish Giant. Elementary school.
Reading-literature: Fourth(Grade) Reader
Apollo and Daphne
Nature Study in Elementary Schools - Second Grade:
April -
May Teacher's manual:
April through May Synopsis and April - May course of study.
Language Lessons from Literature(high school):
RhoecusThe New Barnes Third Grade Reader:
RhoecusThe Classic Myths in English Literature(high school):
Rhoecus and
here.
Junior High School Literature Book Three(ninth grade):
Rhoecus Poems: Lines Written in Early Spring, Wordsworth, the Call of Spring, Noyes and
April North Carolina.
Stories from the Poets: A Reader for the First Grade:
RhoecusDay by Day in the Primary School(early elementary) :
April and
May.
The Child's World Fourth Grade:
RhoecusChildren's Literature:
A Story of Springtime(Myth) and
The Miraculous Pitcher(Philemon and Baucis) by N. HawthorneElson Primary Fourth Grade School Reader:
The Miraculous Pitcher(Philemon and Baucis) by N. HawthorneThe Progressive Road to Reading Fifth Grade:
The Miraculous Pitcher(Philemon and Baucis) by N. HawthorneThe Young and Field Literary Readers:
Old Pipes and the Dryad.A Fourth Grade Reader:
Old Pipes and the Dryad.
Spring Nature Study(elementary school)
Farm Life Fourth Grade Reader:
The Little Brown Seed(poem)The Robin Reader -
A First Reader: Two Little SeedsThe Sprague Classic Second Grade Reader:
The Story of a little Plant,
Pussy Willow Has Come, and
Spring.
Good English, Oral and Written Fourth Grade:
Baby Seed Song(poem)Live Language Lessons:
Springtime Stories, Persephone(middle school)Songs of Happy Life:
April music sheet.New Fifth Grade Reader:
Spring(poem) and
Early Spring, Tennyson(poem)The Heart of Oak Books Sixth Grade:
The Dandelion(poem).Story Land - A Second Reader:
Baby Seed's Song(poem) and
A Spring Folic.
Poems and Verses By Mary Mapes Dodge:
Now the Noisy Winds Are Still.
Nature Study and the Child:
Work for AprilSt. Nicholas By Mary Mapes Dodge:
The HyacinthsKindergarten Stories and Morning Talks:
April - May. Brooks's Seventh Grade Reader:
Spring(Poem) and
April and May poems, pages 131-132.Cyr's Fourth Grade Reader(mislabeled on Google):
Biography of Tennyson. Two of his spring poems:
Early Spring and
The Progress of Spring.
The Elson Eighth Grade Reader:
Flowers in the Crannied Wall, Tennyson. Same in fifth grade reader.
A School Second Grade Reader:
Ceres and Propserpine.
Lessons in Art - A Book for Class-work:
Ceres and Proserpine.
American Primary Teacher: Lesson Plans for
April -
May.
Evenings with Grandpa:
A May Morning, Milton and
The Story of the Season Proserpine.
The Fifth Grade Reader:
An April Day
Flower Children - Little Cousins of the FieldSongs of Happy Life: See bottom of table of contents -
Natures and SeasonsLittle Flower Folks(nature science - botany)In celebration of Shakespeake's birthday on April 23th:Three Years with the Poets(second grade):
Lullaby for TatianaThe Jones Fourth Grade Reader:
Voice of Spring(Poem) and
The Magic Juice(Midsummer's Night's Dream)Shakespeare for Children.Also see my
daffodil post.