Happiness 1
Happiness II
Inventions I
Inventions II
Teacher's Choice
100

socialize

to spend time with other people in a friendly way

100

mood

the way you feel at a particular time

100

benefit

a good or helpful result or effect

100

valuable

of great use or worth a lot of money
100

effort

attempt to do something especially something difficult

200

equal

the same size in number, amount, value, etc.

200

volunteer

to offer to do something without expecting any reward

200

container

an object for holding or carrying something

200

rural 

area away from large towns or cities

200

support

to be kind to someone during a hard time or provide enough money for them to pay for things they need

300

boost

to increase or improve something to make it more successful

300

secure

to protect from harm or danger

300

struggle

to try very hard to do something that is difficult

300

afford

to have enough money to pay for something

300

prevention

the act of making sure that something does not happen

400

provide

to supply or make available

400

factor

one of several things that influence or cause a situation

400

eventually

in the end, especially after a lot of problems

400

store

to keep something for future use

400

grateful

feeling that you want to thank someone because they did something kind

500

track

to record or study the behavior or development of someone or something over time

500
access

the right to enter a place, use something or see someone

500

install

to set up for use or service

500

design

a plan or drawing that shows the look and function of something
500

innovation 

a new method, idea or product