Krypton - periodic table elements chemistry, The chemical element krypton is classed as a noble gas and a nonmetal. it was discovered in 1898 by william ramsay and his assistant morris travers.. Teaching tables - making learning times tables fun, Times table mountain app is now available on ios and android devices! times table mountain provides a fun and engaging way for children to learn their times tables.. Grid method multiplication rjsenior - teaching, Here you will find a powerpoint to introduce (or remind pupils) the grid method of multiplication. the overriding lesson objective is for pupils to be able to.