NSES Content Standard D 
Earth and Space Science: Earth in the Solar System
Grades 5-8, page 160

Most objects in the solar system are in regular and predictable motion. Those motions explain such phenomena as the day, the year, phases of the moon, and eclipses.
 

 
Benchmark 4A The Physical Setting: The Universe
Grades 3-5, page 63
The earth is one of several planets that orbit the sun, and the moon orbits around the earth.

Benchmark 4A The Physical Setting: The Universe
Grades 6-8, page 64
Nine planets of very different size, composition, and surface features move around the sun in nearly circular orbits. Some planets have a great variety of moons and even flat rings of rock and ice particles orbiting around them. Some of these planets and moons show evidence of geologic activity. The earth is orbited by one moon, many artificial satellites, and debris.

Benchmark 4B The Physical Setting: The Earth
Grades 3-5, page 68
Like all planets and stars, the earth is approximately spherical in shape. The rotation of the earth on its axis every 24 hours produces the night-and-day cycle. To people on earth, this turning of the planet makes it seem as though the sun, moon, planets, and stars are orbiting the earth once a day.

Benchmark 4B The Physical Setting: The Earth
Grades 6-8, page 69
The moon's orbit around the earth once in about 28 days changes what part of the moon is lighted by the sun and how much of that part can be seen from the earth--the phases of the moon.