When you play accents, you should ideally use 3 different stick strokes. These are tap stroke, up stroke, and down stroke.
Tap Stroke
You would play a tap stroke if you have just played a quiet note with that hand, and the next note with that hand is another unaccented note.
The tap stroke stick position should start about an inch or a few cms away from the snare drum. Move the stick straight down and hit the drum quietly, before coming straight back up and returning to the starting point.
Up Stroke
You would play a tap stroke if you have just played a quiet note with that hand, and the next note with that hand is an accent.
The up stroke should start in the tap position, and play a tap stroke, but instead of returning to the start position, the stick should end up much higher, somewhere between a 45 and 90 degree angle to the snare drum.
Down Stroke
You would play a Down stroke if you have just played an accent with that hand, and the next note with that hand is an unaccented note.
The stick position should start somewhere between a 45 and 90 degree angle to the snare drum. This stroke should be a loud stroke. Move the stick quickly to produce the loud stroke and finish in the starting position of the tap stroke.
The downstroke produces accents, which look like this: >
Full Stroke
You would play a Full stroke if you have just played an accent with that hand, and there is another accent to follow with that hand. The full stroke, which is played just like a down stroke, but instead of finishing in the tap position, the stick comes back to the starting position of the down stroke. So it plays a loud beat and comes straight back for another one.
Related:
→ The sheet in this post is Page 2 of this ebook: 10 Pages Of Accent Exercises With 16th Notes – PDF Ebook (includes double strokes exercises)
→ 16th Note Hi Hat Grooves With Accents
→ Reading Buzz Rolls And Double Stroke Markings