Mark out an area for your session
Each player should have a basketball
They should also have a hoop or a spot each too
Players should bounce the ball in the hoop or on the spot continuously while scanning their surroundings by looking up
When players are comfortably able to keep the ball bouncing in the hoop, demonstrate the shielding technique of placing your body between the ball and the tackler
Then, as players continue to bounce the ball on the spot, the coach should go around pretending to tackle players. The players need to see the coach coming and place themselves between the coach and the ball to show they can shield
Add in the technique of making their upper body big to further shield the ball
Then choose some of the group (20% of the total in the group) to be tacklers
Their job is to pretend to tackle the dribblers
Swap these players frequently
When players are proficient at this, take away their hoops/spots and allow players to dribble around the area, continue with 20% of the group as tacklers