Each year in elementary school brings new concepts to learn; ACSI's math textbook will introduce your 4th graders to place value, advanced addition/subtraction, multiplication, division, geometry, fractions, decimals, and measurement. Lessons include interdisciplinary facts connected to units on this textbook's theme: The Earth Below. Colorful examples give students a brief introduction to the problem with objective illustrations to help children visualize each step; practice, review or application questions follow. 393 indexed pages, hardcover.