Watch Kneeling Alternating Push Press
B. Standing - if kneeling doesn't work for your knees this can be done standing
Standing can be slightly less intense because you could use the momentum from your lower body to push up overhead.
A. From an all fours/quadruped position
B. High plank position on knees
C. High plank position on toes
B. With weights
*A regular glute bridge can be substituted for this in case you didn't have access to a bench