These are the Starting Points and Aims for the 4 levels that we classify our swimmer's swimming abilities... 
 

Starting Points & Aims...

LEVEL 1      Beginner (Learn to Swim)

Swimming:   cannot swim 25m

Kicking:        cannot kick faster than 1min40 for 50m

Breathing:    major trouble with

Position:       head very high, fatigues very quickly

Feeling:        tentative, very nervous

AIM               learn effective Position & Breathing to begin swimming continuous lengths.

LEVEL 2___Advanced-Beginner (Swim Lessons)

Swimming:    can swim up to 100m Continuous but stops after that

Kicking:         cannot kick faster than 1min25 for 50m (a one-off sprint)

Speed:          of Freestyle: slower than 1min30 per 50m Freestyle

Strokes:        >25 per length (single lengths)

AIM               learn to enhance Breathing & Balance and speed your swimming up

LEVEL 3       Intermediate (Swim Technique)

Swimming:    can swim up to 300m but is tiring and inefficient

Kicking:         cannot kick faster than 1min10 for 50m (a one-off sprint)

Intervals:       of Freestyle: slower than 1min15 per 50m Freestyle repetition

Strokes:        >20 per length (single lengths) and >25 (continuous lengths)

AIM               learn skills to speed you up, swim Intervals, and learn other strokes

LEVEL 4       Advanced (Swim Training with Technique)

Swimming:    can swim over 1000m but inefficiently

AIM               swimming up to 3000m with range of variation in both Speed & Skill