Children would retain a concept or a lesson if it is presented to them in a fun, exciting and novel way. Then that particular concept will be understood over everything else that their brain sees. Children will automatically store that information over all other sensory inputs.
In broad terms, learning outside the classroom includes multiple activities such as a visit to a museum, physical education or projects, adventure activities, environmental education and others. There are no boundaries when it comes to outdoor learning.
STEM learning is skill-based and very hands-on as they require children to use their hands to gain specific kind of knowledge and develop particular skills. Woodcraft, CPR, saving local wildlife, coding, etc, are skills which stay with students for life and can be used by them during their education as well as later in life.
Augmented reality for pre-primary education chiefly focus on helping children familiarise and associate themselves with real-life situations that are otherwise not possible to recreate within the four walls of the classroom.
When students are in a classroom, they learn social interactions with peers; make friends as also establish rapport with teachers. It is vital for children to develop socially along with their academic education.
The concept of even and odd should be taught when the child is making sense of pairs and is well-versed with quantification rather than just learning a rote number sequence. One can also try teaching about these mathematical elements in a story format.