be on the ball
know the score
be with it
know what's what
know what's going on
sussed
hip
clueful
know
informatively
up on
instructively
knowledgeably
informedly
informingly
keep up
informativity
literatured
informativeness
beseek
cognizant
au fait
au courant
abreast
illuminatory
sapient
intelligent
sagacious
appraise
perspicacious
track
well-read
teach
learn
acquainted
well-informed
post
knowledgeable
consultatively
crush it
scious
in the loop
up
insightfully
know-everything
know like the back of one's hand
alliteratively
quick-sighted
inform
interknowledge