infinitive verbs
la clase de
school supplies
classroom furniture/items in the room
adjectives to describe classes
100

This is the main job of a teacher. 

enseñar

100

physical education

educación física

100

the calculator

la calculadora

100

the table

la mesa

100

boring

aburrido/a

200

What you do to prepare for a test. 

estudiar

200

science 

ciencias naturales

200

the computer

la computadora

200

the board (used for both whiteboard and blackboard)

la pizarra

200

difficult

difícil

300

The English translation of this is "to talk."

hablar

300

math

matemáticas

300

keyboard

el teclado

300
the window

la ventana

300

interesting

interesante

400

Verb meaning "to be" when talking about temporary states. It is often used with adjectives. 

estar

400

technology/computers

tecnología

400

the backpack

la mochila

400

the chair

la silla

400

practical

práctico/a

500

Verb meaning "to be." This verb is used to talk about things that don't change.  

ser

500

history

história

500

three-ring binder

la carpeta de argollas

500

the desk

el escritorio

500

fun

divertido/a