Books similar to the following can be used with the lessons in the first grade kit.
George Shrinks by William Joyce
The Fattest, Tallest, Biggest Snowman Ever by Michael Rex
Inch by Inch by Leo Lionni
Tell Me How Far It Is by Shirley Willis
How Tall, How Short, How Far Away by David A. Adler
Money, Honey, Bunny! by Marilyn Sadler
Bunny Money by Rosemary Wells
Arthur’s Pet Business by Marc Brown
26 Letters and 99 Cents by Tana Hoban
Pigs Will Be Pigs by Amy Axelrod
A House for Hermit Crab by Eric Carle
A Busy Year by Leo Lionni
Turtle in July by Marilyn Singer
The Little Red Hen by Paul Galdone
Swimmy by Leo Lionni
Goldilocks and the Three Bears by Valeri Gorbachev
Counting on Frank by Rod Clement
Measuring Penny by Loreen Leedy