What do all these letters and numbers mean? 

What are the Third grade levels?
Fountas and Pinnell: Guided Reading Levels N, O, P, (Q)

Lexile Number: 330L- 700L

What are the 4th grade levels?

Fountas and Pinnell:  Guided Reading Levels Q, R, S, (T) 

Lexile Number (Reading): 700 - 775

NECAP: 440

NWEA:  Reading - Fall 200 / Winter 203 / Spring 206
                 Math - Fall 204 / Winter 209 / Spring 212