Short vowels and their sounds are often difficult for children. For students who are weak on vowel sound discrimination, spelling tests are torture. It follows that reading is hard for them as well.
The incredible challenge in teaching really boring material is that it is also boring to the teacher! Prepositions fall easily into this category of most boring content. So let’s make it fun! Use body movement, color, images, and hands-on activities, and make it such a riot that the children will never ever forget.