Videos 13 - 16 Unit 13: Math and Language Development - How Child’s Play Math actually helps your child’s reading development.Unit 14: Introducing Signs – Addition - The brain enjoys detecting pattern, the more data we give it the better. When we introduce the signs to children we will do so over a short period of time.Unit 15: Introducing Signs – Greater/Smaller - The video introduces children to the ‘greater than’ > and ‘less than’ < signs.Unit 16: Introducing Signs – Equivalence = - T