Scale Challenge – throwing – EChalk January 29, 2016October 18, 2020 adminMeasurement Add to BookmarksRead and estimate different distance scales yr 6Open Activity Other Suggested Activities Sailing Challenge - eChalkMeasure and estimate the angles of the boat's courses. Worm Hunt- EChalkClick on line intersections on the grid, coordinates are shown. Distance given to worm -… Sailing Challenge - eChalkMeasure and estimate the angles of the boat's courses.