____________________, particularly in math and reading, tends to ...

[jrubin]

___________________ _, particularly in math and reading, tends to have a significant effect on children's learning.
 
  Fill in the blank(s) with correct word

Question 2

As infants mature, the range of the pitch of the sounds they can sense gradually expands to include the adult's range of ______________ to _________________ cycles per second
 
  Fill in the blank(s) with correct word

[Viet Thy]

Answer to Question 1

Class size

Answer to Question 2

20; 20,000

[jrubin]

Thanks for the timely response, appreciate it

[Jsherida]

Gracias!