are these sentences correct ?
For an effective learning environment, teachers should take students' needs, interests, cultural background into consideration while teaching in the process.
The importance of understanding learning styles is steadily growing concept in education for many years; however, teachers have been trouble putting this concept into practice.
With the development of technology, it provides teachers numerous opportunities to perform teaching strategies and techniques in the teaching environment.

Question

are these sentences correct ?
For an effective learning environment, teachers should take students' needs, interests, cultural background into consideration while teaching in the process. 
The importance of understanding learning styles is steadily growing concept in education for many years; however, teachers have been trouble putting this concept into practice.
With the development of technology, it provides teachers numerous opportunities to perform teaching strategies and techniques in the teaching environment.

Answer

Almost! Corrections in brackets

For an effective learning environment, teachers should take (the) students' needs, interests (and) cultural background into consideration while teaching.() 
The importance of understanding learning styles (has been a) steadily growing concept in education for many years; however, teachers have (had) trouble putting this concept into practice.
(The) development of technology () provides teachers numerous opportunities to (perfect) teaching strategies and techniques in the (classroom) environment.

And - used before the last idea. Example: It was a long, lonely and dark ride.