This site is like KidSpiration, but it is free and easy to use. elements story, create-your-own-topic. Source: Liz Phillips. After a teacher types in the story starter, students log in to write. read, the class decides which direction the story should take. class agrees the story is finished.
Fetal development - month 1. First trimester. At the end of four weeks: Baby is 1/4 inch long. Heart, digestive system, backbone and spinal cord begin to form. Placenta (sometimes called afterbirth) begins to develop. The single fertilized egg is now 10,000 times larger than it was at conception.
While the initial fertilized cells divide into the fetus and placenta, tiny arms form on the baby. The brain, spinal cord, lungs and heart begin to develop and, by the end of the first month, a heartbeat can be detected. Through the second month, eyelids and ear canals form as well as fingers and toes. Bones and genitals appear. By the third month, all major organs are in place. At just three months, a fetus should weigh about an ounce and measure nearly 3.5 inches. Appendages, internal organs and muscles continue to develop.