'''[https://smallscience.hbcse.tifr.res.in/wp-content/uploads/2016/08/SmallScience1and2-TeachersBook-en.pdf Teacher Book Class 1 and 2]''' | '''[https://smallscience.hbcse.tifr.res.in/wp-content/uploads/2016/08/SmallScience1and2-TeachersBook-en.pdf Teacher Book Class 1 and 2]''' |