Existing "Recruitment" Posters!

I decided that since I'm going to be designing a poster that "recruits" people to study Science at A Level, I should look into existing posters that recruit people (for science, or other things like jobs). Some fall in the design styles I am looking into, some don't.

1   -    2    -    3

4   -    5    -    6

I really like the design styles of the majority of these poster - particularly 3, 4 & 5. Numbers 3 & 4 would fall into the early 20th century sci-fi moving style category, and this is mainly down to the fonts and colours used.

The main reason I looked into existing posters was to find out what information they have on them. The examples I've found are a mixture of job recruitment posters (e.g. army jobs) and then what I'm going to be designing - school club/subject recruitment.

The first common thing I noticed on these posters is that their target audience, or just the general person that is being targeted is written in the biggest letters. On no.2 we know for sure that the poster is aimed at girls because the biggest writing is GIRLS (and just the word itself is a huge clue). On the 1st poster, the word "YOU" is biggest piece of text, and although not the biggest aspect of the poster (the majority of it is an image), it's eye catching because we feel personally targeted by the poster ("who, me?"), even though the actual target audience (young males to join the army) may not actually be ourselves. With number 5, the word "YOUNG" is written in capitals, at the top of the poster in bigger letters than everything else, and this immediately identifies the target audience - if someone were to give this poster a fleeting glance, they'd understand whether it were aimed at them or not.

There seems to the be varying degrees of information on these posters. The poster I'm taking most note of though is number 5, as it fits within the category I'm aiming towards - getting someone to join a club/study a subject. It doesn't have any text that isn't necessary, and uses the tagline as the main, convincing line to get someone to join the club - straight to the point, links to the target audience straight away and no other text needed. This means the poster accomplishes exactly what it sets out to do and is understood by the appropriate people in a very simple way.

Other obvious things I noticed were:

• Imagery related to the subject (e.g. "join chefs club", pictures of a chefs hat, knifes and forks etc)
• Convincing, strong language "fight", "need YOU", get this job "NOW".
• Specific colours to enhance meaning - Poster 2: Red text, the important word in black - black on red is a strong, in a way "serious" combination. In generally heavily contrasting colours for background/text. 
• Varying degrees of info. To relate this to my project, I could use just one line that basically says "study science" or explain in some detail why someone should - should find a balance between eye catching, not convincing enough, or too boring.