A kindergartner has trouble grasping that the amount of juice in the tall glass is the same as the amount of juice in the short glass, and that the large silver dollar is not worth more than the small one. Which concept does he or she lack? symbolic thought
classification
conservation
literacy

Describe two habits that can you move toward achieving your goals.

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Is it ok to have a tooth growing on my crotch and this is school related