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3rd Grade Water Cycle and Weather Units. 9 Complete Lessons Plans incuded. Lessons were created by Ari Wilder in collaboration with 3rd grade teachers at Williamstown Elementary School, Greylock Elementary School, and Brayton Elementary School and edited by Penny Sun, Veronica Gould, and Rachel Ji.


Figure 4: Entropy diagram (T, s) of a real open Brayton cycle (OBC): cycle irreversibilities are shown.

from Etsy

Time out stool, time out chair, time out bench, childrens stool, footstool


The Mercuri is a radical aircraft concept that uses a distributed layout to power 40 micro propellers embedded in its wings. It is capable of vertical take-off (VTOL) and could cover ten times the range of similar aircraft with its recuperated Brayton cycle ceramic turbine and ground effect capabilities.