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.
At the end of 12 weeks: 1  Fetus is 2-1/2 to 3 inches long. 2  Weighs about 1/2 to 1 ounce. 3  Nails start to develop and earlobes are formed.  Fetus develops recognizable 1  form. Arms, hands, fingers, legs, feet and toes are fully formed.  Eyes are almost fully 1  developed. By this stage, a fetus has developed most of his/her organs and tissues.