Hello,

BSc(Hons) is a specialized program which provides you more in-depth information compared to BSc Degree where it's just amalgamation of subjects with no scope for specialization as such.

So, in case you have interest in particular subject for example Chemistry so after pursuing Major in Chemistry, you can further pursue Master's degree in the relavant discipline, in case you want to teach in school you need to have BEd or DEd or any other teacher's training program recognized by NCTE. Academically or even to pursue teaching, it's best you go for Hons program, as your area of specialization will provide you in-depth knowledge.