There are many exercises to help with internalizing movement with the bokken. Below are a few worth practising;

Chudan Uchi-komi (no step)

Basic striking, starting from both hidari-hanmi and migi-hanmi.

Chudan Uchi-komi (with step)

Raise bokken above head to strike (stepping back at the same time), then strike with step forward.

Zengo Undo

Raise  to jodan, pivot 180 degrees, strike. Repeat to the count of two, both hidari-hanmi and migi-hanmi.

Shiho Undo #1

Strike with each step, counting to four each set. Repeat from hidari-hanmi and migi-hanmi.

Shiho Undo #2

This exercise can also be done with tsuki for each direction. Count to four each set.

Shiho Undo #3

This exercise can also be done combining chudan uchi-komi + tsuki for each direction. Count to four each set.

Mae Shikko

Strike with each step. Good exercise for developing hip strength, centre and balance.

Tenkan

Raise bokken, tenkan 180 degrees, then strike. Repeat from both hidari-hanmi and migi-hanmi.

Kiri-kaeshi (with partner)

Take turns moving forward with kiri-kaeshi strikes while Uke blocks and moves backwards with large steps.

Random techniques standing in a circle

The class forms a circle and each person takes a turn to the count of 10. This helps develop strength and endurance. Also as the body tires, you learn how to become more efficient with your technique.

Tsuki (without step)

Tsuki (with step)