Polymer clays or plasticine clays are made of synthetic plastics and require âcuringâ or low heat to harden. They stay moldable for a very long time if stored properly in a plastic or metal box (no paper or fabric that would absorb the moisture). Polymer clays are usually very smooth and have a silky feeling.
On average, 4th graders are 9-10 years old because that is the normal age for the grade. But kids could potentially be anywhere from about 8 to 11 years old, since some kids hâ¦ave to repeat a year in school and get behind, and then some kids are a year ahead or have late birthdays before the cut-off date.
Anonymous. To be considered as reading at grade level, 2nd graders need to be at a 28 or higher by the end of 2nd grade. Keep in mind that this is a benchmark for all 2nd graders-so the vast majority would be reading far above that level. Grade level is set at the 25th or 16th percentile, depending on the test.